chrome/browser/sync/profile_sync_service.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/sync/profile_sync_service.h"
   6
   7 #include <cstddef>
   8 #include <map>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/bind.h"
  13 #include "base/bind_helpers.h"
  14 #include "base/callback.h"
  15 #include "base/command_line.h"
  16 #include "base/compiler_specific.h"
  17 #include "base/files/file_util.h"
  18 #include "base/logging.h"
  19 #include "base/memory/ref_counted.h"
  20 #include "base/message_loop/message_loop.h"
  21 #include "base/metrics/histogram.h"
  22 #include "base/profiler/scoped_tracker.h"
  23 #include "base/strings/string16.h"
  24 #include "base/strings/stringprintf.h"
  25 #include "base/threading/thread_restrictions.h"
  26 #include "build/build_config.h"
  27 #include "chrome/browser/browser_process.h"
  28 #include "chrome/browser/browsing_data/browsing_data_helper.h"
  29 #include "chrome/browser/chrome_notification_types.h"
  30 #include "chrome/browser/defaults.h"
  31 #include "chrome/browser/invalidation/profile_invalidation_provider_factory.h"
  32 #include "chrome/browser/net/chrome_cookie_notification_details.h"
  33 #include "chrome/browser/password_manager/password_store_factory.h"
  34 #include "chrome/browser/prefs/chrome_pref_service_factory.h"
  35 #include "chrome/browser/prefs/pref_service_syncable.h"
  36 #include "chrome/browser/profiles/profile.h"
  37 #include "chrome/browser/signin/about_signin_internals_factory.h"
  38 #include "chrome/browser/signin/chrome_signin_client_factory.h"
  39 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
  40 #include "chrome/browser/signin/signin_manager_factory.h"
  41 #include "chrome/browser/sync/backend_migrator.h"
  42 #include "chrome/browser/sync/glue/chrome_report_unrecoverable_error.h"
  43 #include "chrome/browser/sync/glue/favicon_cache.h"
  44 #include "chrome/browser/sync/glue/sync_backend_host.h"
  45 #include "chrome/browser/sync/glue/sync_backend_host_impl.h"
  46 #include "chrome/browser/sync/glue/sync_start_util.h"
  47 #include "chrome/browser/sync/glue/typed_url_data_type_controller.h"
  48 #include "chrome/browser/sync/profile_sync_components_factory_impl.h"
  49 #include "chrome/browser/sync/sessions/notification_service_sessions_router.h"
  50 #include "chrome/browser/sync/supervised_user_signin_manager_wrapper.h"
  51 #include "chrome/browser/sync/sync_error_controller.h"
  52 #include "chrome/browser/sync/sync_stopped_reporter.h"
  53 #include "chrome/browser/sync/sync_type_preference_provider.h"
  54 #include "chrome/browser/ui/browser.h"
  55 #include "chrome/browser/ui/browser_list.h"
  56 #include "chrome/browser/ui/browser_window.h"
  57 #include "chrome/browser/ui/global_error/global_error_service.h"
  58 #include "chrome/browser/ui/global_error/global_error_service_factory.h"
  59 #include "chrome/common/chrome_switches.h"
  60 #include "chrome/common/chrome_version_info.h"
  61 #include "chrome/common/pref_names.h"
  62 #include "chrome/common/url_constants.h"
  63 #include "chrome/grit/generated_resources.h"
  64 #include "components/autofill/core/common/autofill_pref_names.h"
  65 #include "components/invalidation/invalidation_service.h"
  66 #include "components/invalidation/profile_invalidation_provider.h"
  67 #include "components/password_manager/core/browser/password_store.h"
  68 #include "components/pref_registry/pref_registry_syncable.h"
  69 #include "components/signin/core/browser/about_signin_internals.h"
  70 #include "components/signin/core/browser/profile_oauth2_token_service.h"
  71 #include "components/signin/core/browser/signin_manager.h"
  72 #include "components/signin/core/browser/signin_metrics.h"
  73 #include "components/sync_driver/change_processor.h"
  74 #include "components/sync_driver/data_type_controller.h"
  75 #include "components/sync_driver/device_info.h"
  76 #include "components/sync_driver/pref_names.h"
  77 #include "components/sync_driver/system_encryptor.h"
  78 #include "components/sync_driver/user_selectable_sync_type.h"
  79 #include "content/public/browser/browser_thread.h"
  80 #include "content/public/browser/notification_details.h"
  81 #include "content/public/browser/notification_service.h"
  82 #include "content/public/browser/notification_source.h"
  83 #include "net/cookies/cookie_monster.h"
  84 #include "net/url_request/url_request_context_getter.h"
  85 #include "sync/api/sync_error.h"
  86 #include "sync/internal_api/public/configure_reason.h"
  87 #include "sync/internal_api/public/http_bridge_network_resources.h"
  88 #include "sync/internal_api/public/network_resources.h"
  89 #include "sync/internal_api/public/sessions/type_debug_info_observer.h"
  90 #include "sync/internal_api/public/shutdown_reason.h"
  91 #include "sync/internal_api/public/sync_context_proxy.h"
  92 #include "sync/internal_api/public/sync_encryption_handler.h"
  93 #include "sync/internal_api/public/util/experiments.h"
  94 #include "sync/internal_api/public/util/sync_db_util.h"
  95 #include "sync/internal_api/public/util/sync_string_conversions.h"
  96 #include "sync/js/js_event_details.h"
  97 #include "sync/protocol/sync.pb.h"
  98 #include "sync/syncable/directory.h"
  99 #include "sync/util/cryptographer.h"
 100 #include "ui/base/l10n/l10n_util.h"
 101 #include "ui/base/l10n/time_format.h"
 102
 103 #if defined(OS_ANDROID)
 104 #include "sync/internal_api/public/read_transaction.h"
 105 #endif
 106
 107 using browser_sync::NotificationServiceSessionsRouter;
 108 using browser_sync::ProfileSyncServiceStartBehavior;
 109 using browser_sync::SessionsSyncManager;
 110 using browser_sync::SyncBackendHost;
 111 using sync_driver::ChangeProcessor;
 112 using sync_driver::DataTypeController;
 113 using sync_driver::DataTypeManager;
 114 using sync_driver::DataTypeStatusTable;
 115 using sync_driver::DeviceInfoSyncService;
 116 using syncer::ModelType;
 117 using syncer::ModelTypeSet;
 118 using syncer::JsBackend;
 119 using syncer::JsController;
 120 using syncer::JsEventDetails;
 121 using syncer::JsEventHandler;
 122 using syncer::ModelSafeRoutingInfo;
 123 using syncer::SyncCredentials;
 124 using syncer::SyncProtocolError;
 125 using syncer::WeakHandle;
 126
 127 typedef GoogleServiceAuthError AuthError;
 128
 129 const char* ProfileSyncService::kSyncServerUrl =
 130     "https://clients4.google.com/chrome-sync";
 131
 132 const char* ProfileSyncService::kDevServerUrl =
 133     "https://clients4.google.com/chrome-sync/dev";
 134
 135 const char kSyncUnrecoverableErrorHistogram[] =
 136     "Sync.UnrecoverableErrors";
 137
 138 const net::BackoffEntry::Policy kRequestAccessTokenBackoffPolicy = {
 139   // Number of initial errors (in sequence) to ignore before applying
 140   // exponential back-off rules.
 141   0,
 142
 143   // Initial delay for exponential back-off in ms.
 144   2000,
 145
 146   // Factor by which the waiting time will be multiplied.
 147   2,
 148
 149   // Fuzzing percentage. ex: 10% will spread requests randomly
 150   // between 90%-100% of the calculated time.
 151   0.2, // 20%
 152
 153   // Maximum amount of time we are willing to delay our request in ms.
 154   // TODO(pavely): crbug.com/246686 ProfileSyncService should retry
 155   // RequestAccessToken on connection state change after backoff
 156   1000 * 3600 * 4, // 4 hours.
 157
 158   // Time to keep an entry from being discarded even when it
 159   // has no significant state, -1 to never discard.
 160   -1,
 161
 162   // Don't use initial delay unless the last request was an error.
 163   false,
 164 };
 165
 166 static const base::FilePath::CharType kSyncDataFolderName[] =
 167     FILE_PATH_LITERAL("Sync Data");
 168
 169 static const base::FilePath::CharType kSyncBackupDataFolderName[] =
 170     FILE_PATH_LITERAL("Sync Data Backup");
 171
 172 namespace {
 173
 174 void ClearBrowsingData(BrowsingDataRemover::Observer* observer,
 175                        Profile* profile,
 176                        base::Time start,
 177                        base::Time end) {
 178   // BrowsingDataRemover deletes itself when it's done.
 179   BrowsingDataRemover* remover = BrowsingDataRemover::CreateForRange(
 180       profile, start, end);
 181   if (observer)
 182     remover->AddObserver(observer);
 183   remover->Remove(BrowsingDataRemover::REMOVE_ALL,
 184                   BrowsingDataHelper::ALL);
 185
 186   scoped_refptr<password_manager::PasswordStore> password =
 187       PasswordStoreFactory::GetForProfile(profile,
 188                                           ServiceAccessType::EXPLICIT_ACCESS);
 189   password->RemoveLoginsSyncedBetween(start, end);
 190 }
 191
 192 // Perform the actual sync data folder deletion.
 193 // This should only be called on the sync thread.
 194 void DeleteSyncDataFolder(const base::FilePath& directory_path) {
 195   if (base::DirectoryExists(directory_path)) {
 196     if (!base::DeleteFile(directory_path, true))
 197       LOG(DFATAL) << "Could not delete the Sync Data folder.";
 198   }
 199 }
 200
 201 }  // anonymous namespace
 202
 203 bool ShouldShowActionOnUI(
 204     const syncer::SyncProtocolError& error) {
 205   return (error.action != syncer::UNKNOWN_ACTION &&
 206           error.action != syncer::DISABLE_SYNC_ON_CLIENT &&
 207           error.action != syncer::STOP_SYNC_FOR_DISABLED_ACCOUNT);
 208 }
 209
 210 ProfileSyncService::ProfileSyncService(
 211     scoped_ptr<ProfileSyncComponentsFactory> factory,
 212     Profile* profile,
 213     scoped_ptr<SupervisedUserSigninManagerWrapper> signin_wrapper,
 214     ProfileOAuth2TokenService* oauth2_token_service,
 215     ProfileSyncServiceStartBehavior start_behavior)
 216     : OAuth2TokenService::Consumer("sync"),
 217       last_auth_error_(AuthError::AuthErrorNone()),
 218       passphrase_required_reason_(syncer::REASON_PASSPHRASE_NOT_REQUIRED),
 219       factory_(factory.Pass()),
 220       profile_(profile),
 221       sync_prefs_(profile_->GetPrefs()),
 222       sync_service_url_(
 223           GetSyncServiceURL(*base::CommandLine::ForCurrentProcess())),
 224       is_first_time_sync_configure_(false),
 225       backend_initialized_(false),
 226       sync_disabled_by_admin_(false),
 227       is_auth_in_progress_(false),
 228       signin_(signin_wrapper.Pass()),
 229       unrecoverable_error_reason_(ERROR_REASON_UNSET),
 230       expect_sync_configuration_aborted_(false),
 231       encrypted_types_(syncer::SyncEncryptionHandler::SensitiveTypes()),
 232       encrypt_everything_allowed_(true),
 233       encrypt_everything_(false),
 234       encryption_pending_(false),
 235       configure_status_(DataTypeManager::UNKNOWN),
 236       oauth2_token_service_(oauth2_token_service),
 237       request_access_token_backoff_(&kRequestAccessTokenBackoffPolicy),
 238       connection_status_(syncer::CONNECTION_NOT_ATTEMPTED),
 239       last_get_token_error_(GoogleServiceAuthError::AuthErrorNone()),
 240       network_resources_(new syncer::HttpBridgeNetworkResources),
 241       backend_mode_(IDLE),
 242       need_backup_(false),
 243       backup_finished_(false),
 244       clear_browsing_data_(base::Bind(&ClearBrowsingData)),
 245       browsing_data_remover_observer_(NULL),
 246       sync_stopped_reporter_(
 247           new browser_sync::SyncStoppedReporter(
 248               sync_service_url_,
 249               profile_->GetRequestContext(),
 250               browser_sync::SyncStoppedReporter::ResultCallback())),
 251       weak_factory_(this),
 252       startup_controller_weak_factory_(this) {
 253   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 254   DCHECK(profile);
 255   startup_controller_.reset(new browser_sync::StartupController(
 256       start_behavior,
 257       oauth2_token_service,
 258       &sync_prefs_,
 259       signin_.get(),
 260       base::Bind(&ProfileSyncService::StartUpSlowBackendComponents,
 261                  startup_controller_weak_factory_.GetWeakPtr(),
 262                  SYNC)));
 263   backup_rollback_controller_.reset(new browser_sync::BackupRollbackController(
 264       &sync_prefs_,
 265       signin_.get(),
 266       base::Bind(&ProfileSyncService::StartUpSlowBackendComponents,
 267                  startup_controller_weak_factory_.GetWeakPtr(),
 268                  BACKUP),
 269       base::Bind(&ProfileSyncService::StartUpSlowBackendComponents,
 270                  startup_controller_weak_factory_.GetWeakPtr(),
 271                  ROLLBACK)));
 272   syncer::SyncableService::StartSyncFlare flare(
 273       sync_start_util::GetFlareForSyncableService(profile->GetPath()));
 274   scoped_ptr<browser_sync::LocalSessionEventRouter> router(
 275       new NotificationServiceSessionsRouter(profile, flare));
 276
 277   DCHECK(factory_.get());
 278   local_device_ = factory_->CreateLocalDeviceInfoProvider();
 279   sessions_sync_manager_.reset(
 280       new SessionsSyncManager(profile, local_device_.get(), router.Pass()));
 281   device_info_sync_service_.reset(
 282       new DeviceInfoSyncService(local_device_.get()));
 283 }
 284
 285 ProfileSyncService::~ProfileSyncService() {
 286   sync_prefs_.RemoveSyncPrefObserver(this);
 287   // Shutdown() should have been called before destruction.
 288   CHECK(!backend_initialized_);
 289 }
 290
 291 bool ProfileSyncService::IsSyncEnabledAndLoggedIn() {
 292   // Exit if sync is disabled.
 293   if (IsManaged() || sync_prefs_.IsStartSuppressed())
 294     return false;
 295
 296   // Sync is logged in if there is a non-empty effective username.
 297   return !signin_->GetEffectiveUsername().empty();
 298 }
 299
 300 bool ProfileSyncService::IsOAuthRefreshTokenAvailable() {
 301   if (!oauth2_token_service_)
 302     return false;
 303
 304   return oauth2_token_service_->RefreshTokenIsAvailable(
 305       signin_->GetAccountIdToUse());
 306 }
 307
 308 void ProfileSyncService::Initialize() {
 309   // We clear this here (vs Shutdown) because we want to remember that an error
 310   // happened on shutdown so we can display details (message, location) about it
 311   // in about:sync.
 312   ClearStaleErrors();
 313
 314   sync_prefs_.AddSyncPrefObserver(this);
 315
 316   // For now, the only thing we can do through policy is to turn sync off.
 317   if (IsManaged()) {
 318     DisableForUser();
 319     return;
 320   }
 321
 322   RegisterAuthNotifications();
 323
 324   if (!HasSyncSetupCompleted() || signin_->GetEffectiveUsername().empty()) {
 325     // Clean up in case of previous crash / setup abort / signout.
 326     DisableForUser();
 327   }
 328
 329   TrySyncDatatypePrefRecovery();
 330
 331 #if defined(OS_CHROMEOS)
 332   std::string bootstrap_token = sync_prefs_.GetEncryptionBootstrapToken();
 333   if (bootstrap_token.empty()) {
 334     sync_prefs_.SetEncryptionBootstrapToken(
 335         sync_prefs_.GetSpareBootstrapToken());
 336   }
 337 #endif
 338
 339 #if !defined(OS_ANDROID)
 340   DCHECK(sync_error_controller_ == NULL)
 341       << "Initialize() called more than once.";
 342   sync_error_controller_.reset(new SyncErrorController(this));
 343   AddObserver(sync_error_controller_.get());
 344 #endif
 345
 346   bool running_rollback = false;
 347   if (browser_sync::BackupRollbackController::IsBackupEnabled()) {
 348     // Backup is needed if user's not signed in or signed in but previous
 349     // backup didn't finish, i.e. backend didn't switch from backup to sync.
 350     need_backup_ = signin_->GetEffectiveUsername().empty() ||
 351         sync_prefs_.GetFirstSyncTime().is_null();
 352
 353     // Try to resume rollback if it didn't finish in last session.
 354     running_rollback = backup_rollback_controller_->StartRollback();
 355   } else {
 356     need_backup_ = false;
 357   }
 358
 359 #if defined(ENABLE_PRE_SYNC_BACKUP)
 360   if (!running_rollback && signin_->GetEffectiveUsername().empty()) {
 361     CleanUpBackup();
 362   }
 363 #else
 364   DCHECK(!running_rollback);
 365 #endif
 366
 367   startup_controller_->Reset(GetRegisteredDataTypes());
 368   startup_controller_->TryStart();
 369 }
 370
 371 void ProfileSyncService::TrySyncDatatypePrefRecovery() {
 372   DCHECK(!backend_initialized());
 373   if (!HasSyncSetupCompleted())
 374     return;
 375
 376   // There was a bug where OnUserChoseDatatypes was not properly called on
 377   // configuration (see crbug.com/154940). We detect this by checking whether
 378   // kSyncKeepEverythingSynced has a default value. If so, and sync setup has
 379   // completed, it means sync was not properly configured, so we manually
 380   // set kSyncKeepEverythingSynced.
 381   PrefService* const pref_service = profile_->GetPrefs();
 382   if (!pref_service)
 383     return;
 384   if (GetPreferredDataTypes().Size() > 1)
 385     return;
 386
 387   const PrefService::Preference* keep_everything_synced =
 388       pref_service->FindPreference(
 389           sync_driver::prefs::kSyncKeepEverythingSynced);
 390   // This will be false if the preference was properly set or if it's controlled
 391   // by policy.
 392   if (!keep_everything_synced->IsDefaultValue())
 393     return;
 394
 395   // kSyncKeepEverythingSynced was not properly set. Set it and the preferred
 396   // types now, before we configure.
 397   UMA_HISTOGRAM_COUNTS("Sync.DatatypePrefRecovery", 1);
 398   sync_prefs_.SetKeepEverythingSynced(true);
 399   syncer::ModelTypeSet registered_types = GetRegisteredDataTypes();
 400 }
 401
 402 void ProfileSyncService::StartSyncingWithServer() {
 403   if (backend_)
 404     backend_->StartSyncingWithServer();
 405 }
 406
 407 void ProfileSyncService::RegisterAuthNotifications() {
 408   oauth2_token_service_->AddObserver(this);
 409   if (signin())
 410     signin()->AddObserver(this);
 411 }
 412
 413 void ProfileSyncService::UnregisterAuthNotifications() {
 414   if (signin())
 415     signin()->RemoveObserver(this);
 416   oauth2_token_service_->RemoveObserver(this);
 417 }
 418
 419 void ProfileSyncService::RegisterDataTypeController(
 420     DataTypeController* data_type_controller) {
 421   DCHECK_EQ(
 422       directory_data_type_controllers_.count(data_type_controller->type()),
 423       0U);
 424   DCHECK(!GetRegisteredNonBlockingDataTypes().Has(
 425       data_type_controller->type()));
 426   directory_data_type_controllers_[data_type_controller->type()] =
 427       data_type_controller;
 428 }
 429
 430 void ProfileSyncService::RegisterNonBlockingType(syncer::ModelType type) {
 431   DCHECK_EQ(directory_data_type_controllers_.count(type), 0U)
 432       << "Duplicate registration of type " << ModelTypeToString(type);
 433
 434   // TODO(rlarocque): Set the enable flag properly when crbug.com/368834 is
 435   // fixed and we have some way of telling whether or not this type should be
 436   // enabled.
 437   non_blocking_data_type_manager_.RegisterType(type, false);
 438 }
 439
 440 void ProfileSyncService::InitializeNonBlockingType(
 441     syncer::ModelType type,
 442     const scoped_refptr<base::SequencedTaskRunner>& task_runner,
 443     const base::WeakPtr<syncer::ModelTypeSyncProxyImpl>& type_sync_proxy) {
 444   non_blocking_data_type_manager_.InitializeType(
 445       type, task_runner, type_sync_proxy);
 446 }
 447
 448 bool ProfileSyncService::IsDataTypeControllerRunning(
 449     syncer::ModelType type) const {
 450   DataTypeController::TypeMap::const_iterator iter =
 451       directory_data_type_controllers_.find(type);
 452   if (iter == directory_data_type_controllers_.end()) {
 453     return false;
 454   }
 455   return iter->second->state() == DataTypeController::RUNNING;
 456 }
 457
 458 browser_sync::OpenTabsUIDelegate* ProfileSyncService::GetOpenTabsUIDelegate() {
 459   if (!IsDataTypeControllerRunning(syncer::SESSIONS))
 460     return NULL;
 461   return sessions_sync_manager_.get();
 462 }
 463
 464 browser_sync::FaviconCache* ProfileSyncService::GetFaviconCache() {
 465   return sessions_sync_manager_->GetFaviconCache();
 466 }
 467
 468 browser_sync::SyncedWindowDelegatesGetter*
 469 ProfileSyncService::GetSyncedWindowDelegatesGetter() const {
 470   return sessions_sync_manager_->GetSyncedWindowDelegatesGetter();
 471 }
 472
 473 sync_driver::DeviceInfoTracker* ProfileSyncService::GetDeviceInfoTracker()
 474     const {
 475   return device_info_sync_service_.get();
 476 }
 477
 478 sync_driver::LocalDeviceInfoProvider*
 479 ProfileSyncService::GetLocalDeviceInfoProvider() {
 480   return local_device_.get();
 481 }
 482
 483 void ProfileSyncService::GetDataTypeControllerStates(
 484   DataTypeController::StateMap* state_map) const {
 485     for (DataTypeController::TypeMap::const_iterator iter =
 486          directory_data_type_controllers_.begin();
 487          iter != directory_data_type_controllers_.end();
 488          ++iter)
 489       (*state_map)[iter->first] = iter->second.get()->state();
 490 }
 491
 492 SyncCredentials ProfileSyncService::GetCredentials() {
 493   SyncCredentials credentials;
 494   if (backend_mode_ == SYNC) {
 495     credentials.email = signin_->GetEffectiveUsername();
 496     DCHECK(!credentials.email.empty());
 497     credentials.sync_token = access_token_;
 498
 499     if (credentials.sync_token.empty())
 500       credentials.sync_token = "credentials_lost";
 501
 502     credentials.scope_set.insert(signin_->GetSyncScopeToUse());
 503   }
 504
 505   return credentials;
 506 }
 507
 508 bool ProfileSyncService::ShouldDeleteSyncFolder() {
 509   switch (backend_mode_) {
 510     case SYNC:
 511       return !HasSyncSetupCompleted();
 512     case BACKUP:
 513       return true;
 514     case ROLLBACK:
 515       return false;
 516     case IDLE:
 517       NOTREACHED();
 518       return true;
 519   }
 520   return true;
 521 }
 522
 523 void ProfileSyncService::InitializeBackend(bool delete_stale_data) {
 524   if (!backend_) {
 525     NOTREACHED();
 526     return;
 527   }
 528
 529   SyncCredentials credentials = GetCredentials();
 530
 531   scoped_refptr<net::URLRequestContextGetter> request_context_getter(
 532       profile_->GetRequestContext());
 533
 534   if (backend_mode_ == SYNC && delete_stale_data)
 535     ClearStaleErrors();
 536
 537   scoped_ptr<syncer::UnrecoverableErrorHandler>
 538       backend_unrecoverable_error_handler(
 539           new browser_sync::BackendUnrecoverableErrorHandler(
 540               MakeWeakHandle(weak_factory_.GetWeakPtr())));
 541
 542   backend_->Initialize(
 543       this,
 544       sync_thread_.Pass(),
 545       GetJsEventHandler(),
 546       sync_service_url_,
 547       credentials,
 548       delete_stale_data,
 549       scoped_ptr<syncer::SyncManagerFactory>(
 550           new syncer::SyncManagerFactory(GetManagerType())).Pass(),
 551       backend_unrecoverable_error_handler.Pass(),
 552       &browser_sync::ChromeReportUnrecoverableError,
 553       network_resources_.get());
 554 }
 555
 556 bool ProfileSyncService::IsEncryptedDatatypeEnabled() const {
 557   if (encryption_pending())
 558     return true;
 559   const syncer::ModelTypeSet preferred_types = GetPreferredDataTypes();
 560   const syncer::ModelTypeSet encrypted_types = GetEncryptedDataTypes();
 561   DCHECK(encrypted_types.Has(syncer::PASSWORDS));
 562   return !Intersection(preferred_types, encrypted_types).Empty();
 563 }
 564
 565 void ProfileSyncService::OnProtocolEvent(
 566     const syncer::ProtocolEvent& event) {
 567   FOR_EACH_OBSERVER(browser_sync::ProtocolEventObserver,
 568                     protocol_event_observers_,
 569                     OnProtocolEvent(event));
 570 }
 571
 572 void ProfileSyncService::OnDirectoryTypeCommitCounterUpdated(
 573     syncer::ModelType type,
 574     const syncer::CommitCounters& counters) {
 575   FOR_EACH_OBSERVER(syncer::TypeDebugInfoObserver,
 576                     type_debug_info_observers_,
 577                     OnCommitCountersUpdated(type, counters));
 578 }
 579
 580 void ProfileSyncService::OnDirectoryTypeUpdateCounterUpdated(
 581     syncer::ModelType type,
 582     const syncer::UpdateCounters& counters) {
 583   FOR_EACH_OBSERVER(syncer::TypeDebugInfoObserver,
 584                     type_debug_info_observers_,
 585                     OnUpdateCountersUpdated(type, counters));
 586 }
 587
 588 void ProfileSyncService::OnDirectoryTypeStatusCounterUpdated(
 589     syncer::ModelType type,
 590     const syncer::StatusCounters& counters) {
 591   FOR_EACH_OBSERVER(syncer::TypeDebugInfoObserver,
 592                     type_debug_info_observers_,
 593                     OnStatusCountersUpdated(type, counters));
 594 }
 595
 596 void ProfileSyncService::OnDataTypeRequestsSyncStartup(
 597     syncer::ModelType type) {
 598   DCHECK(syncer::UserTypes().Has(type));
 599   if (backend_.get()) {
 600     DVLOG(1) << "A data type requested sync startup, but it looks like "
 601                 "something else beat it to the punch.";
 602     return;
 603   }
 604
 605   if (!GetPreferredDataTypes().Has(type)) {
 606     // We can get here as datatype SyncableServices are typically wired up
 607     // to the native datatype even if sync isn't enabled.
 608     DVLOG(1) << "Dropping sync startup request because type "
 609              << syncer::ModelTypeToString(type) << "not enabled.";
 610     return;
 611   }
 612
 613   startup_controller_->OnDataTypeRequestsSyncStartup(type);
 614 }
 615
 616 void ProfileSyncService::StartUpSlowBackendComponents(
 617     ProfileSyncService::BackendMode mode) {
 618   DCHECK_NE(IDLE, mode);
 619   if (backend_mode_ == mode) {
 620     return;
 621   }
 622
 623   // Backend mode transition rules:
 624   // * can transit from IDLE to any other non-IDLE mode.
 625   // * forbidden to transit from SYNC to any other mode, i.e. SYNC backend must
 626   //   be explicitly shut down before backup/rollback starts.
 627   // * can not transit out of ROLLBACK mode until rollback is finished
 628   //   (successfully or unsuccessfully).
 629   // * can not transit out of BACKUP mode until backup is finished
 630   //   (successfully or unsuccessfully).
 631   // * if backup is needed, can only transit to SYNC if backup is finished,
 632
 633   if (backend_mode_ == SYNC) {
 634     LOG(DFATAL) << "Shouldn't switch from mode SYNC to mode " << mode;
 635     return;
 636   }
 637
 638   if (backend_mode_ == ROLLBACK ||
 639       (backend_mode_ == BACKUP && !backup_finished_)) {
 640     // Wait for rollback/backup to finish before start new backend.
 641     return;
 642   }
 643
 644   if (mode == SYNC && NeedBackup() && !backup_finished_) {
 645     if (backend_mode_ != BACKUP)
 646       backup_rollback_controller_->StartBackup();
 647     return;
 648   }
 649
 650   DVLOG(1) << "Start backend mode: " << mode;
 651
 652   if (backend_) {
 653     if (mode == SYNC)
 654       ShutdownImpl(syncer::SWITCH_MODE_SYNC);
 655     else
 656       ShutdownImpl(syncer::STOP_SYNC);
 657   }
 658
 659   backend_mode_ = mode;
 660
 661   if (backend_mode_ == BACKUP)
 662     backup_start_time_ = base::Time::Now();
 663
 664   if (backend_mode_ == SYNC && !backup_start_time_.is_null()) {
 665     UMA_HISTOGRAM_MEDIUM_TIMES("Sync.FirstSyncDelayByBackup",
 666                                base::Time::Now() - backup_start_time_);
 667     backup_start_time_ = base::Time();
 668   }
 669
 670   if (backend_mode_ == ROLLBACK)
 671     ClearBrowsingDataSinceFirstSync();
 672   else if (backend_mode_ == SYNC)
 673     CheckSyncBackupIfNeeded();
 674
 675   base::FilePath sync_folder = backend_mode_ == SYNC ?
 676       base::FilePath(kSyncDataFolderName) :
 677       base::FilePath(kSyncBackupDataFolderName);
 678
 679   invalidation::InvalidationService* invalidator = NULL;
 680   if (backend_mode_ == SYNC) {
 681     invalidation::ProfileInvalidationProvider* provider =
 682         invalidation::ProfileInvalidationProviderFactory::GetForProfile(
 683             profile_);
 684     if (provider)
 685       invalidator = provider->GetInvalidationService();
 686   }
 687
 688   directory_path_ = profile_->GetPath().Append(sync_folder);
 689
 690   backend_.reset(
 691       factory_->CreateSyncBackendHost(
 692           profile_->GetDebugName(),
 693           profile_,
 694           invalidator,
 695           sync_prefs_.AsWeakPtr(),
 696           sync_folder));
 697
 698   // Initialize the backend.  Every time we start up a new SyncBackendHost,
 699   // we'll want to start from a fresh SyncDB, so delete any old one that might
 700   // be there.
 701   InitializeBackend(ShouldDeleteSyncFolder());
 702
 703   UpdateFirstSyncTimePref();
 704 }
 705
 706 void ProfileSyncService::OnGetTokenSuccess(
 707     const OAuth2TokenService::Request* request,
 708     const std::string& access_token,
 709     const base::Time& expiration_time) {
 710   DCHECK_EQ(access_token_request_, request);
 711   access_token_request_.reset();
 712   access_token_ = access_token;
 713   token_receive_time_ = base::Time::Now();
 714   last_get_token_error_ = GoogleServiceAuthError::AuthErrorNone();
 715
 716   if (sync_prefs_.SyncHasAuthError()) {
 717     sync_prefs_.SetSyncAuthError(false);
 718     UMA_HISTOGRAM_ENUMERATION("Sync.SyncAuthError",
 719                               AUTH_ERROR_FIXED,
 720                               AUTH_ERROR_LIMIT);
 721   }
 722
 723   if (HasSyncingBackend())
 724     backend_->UpdateCredentials(GetCredentials());
 725   else
 726     startup_controller_->TryStart();
 727 }
 728
 729 void ProfileSyncService::OnGetTokenFailure(
 730     const OAuth2TokenService::Request* request,
 731     const GoogleServiceAuthError& error) {
 732   DCHECK_EQ(access_token_request_, request);
 733   DCHECK_NE(error.state(), GoogleServiceAuthError::NONE);
 734   access_token_request_.reset();
 735   last_get_token_error_ = error;
 736   switch (error.state()) {
 737     case GoogleServiceAuthError::CONNECTION_FAILED:
 738     case GoogleServiceAuthError::REQUEST_CANCELED:
 739     case GoogleServiceAuthError::SERVICE_ERROR:
 740     case GoogleServiceAuthError::SERVICE_UNAVAILABLE: {
 741       // Transient error. Retry after some time.
 742       request_access_token_backoff_.InformOfRequest(false);
 743       next_token_request_time_ = base::Time::Now() +
 744           request_access_token_backoff_.GetTimeUntilRelease();
 745       request_access_token_retry_timer_.Start(
 746             FROM_HERE,
 747             request_access_token_backoff_.GetTimeUntilRelease(),
 748             base::Bind(&ProfileSyncService::RequestAccessToken,
 749                         weak_factory_.GetWeakPtr()));
 750       NotifyObservers();
 751       break;
 752     }
 753     case GoogleServiceAuthError::INVALID_GAIA_CREDENTIALS: {
 754       if (!sync_prefs_.SyncHasAuthError()) {
 755         sync_prefs_.SetSyncAuthError(true);
 756         UMA_HISTOGRAM_ENUMERATION("Sync.SyncAuthError",
 757                                   AUTH_ERROR_ENCOUNTERED,
 758                                   AUTH_ERROR_LIMIT);
 759       }
 760       // Fallthrough.
 761     }
 762     default: {
 763       if (error.state() != GoogleServiceAuthError::INVALID_GAIA_CREDENTIALS) {
 764         LOG(ERROR) << "Unexpected persistent error: " << error.ToString();
 765       }
 766       // Show error to user.
 767       UpdateAuthErrorState(error);
 768     }
 769   }
 770 }
 771
 772 void ProfileSyncService::OnRefreshTokenAvailable(
 773     const std::string& account_id) {
 774   // TODO(robliao): Remove ScopedTracker below once https://crbug.com/422460 is
 775   // fixed.
 776   tracked_objects::ScopedTracker tracking_profile(
 777       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 778           "422460 ProfileSyncService::OnRefreshTokenAvailable"));
 779
 780   if (account_id == signin_->GetAccountIdToUse())
 781     OnRefreshTokensLoaded();
 782 }
 783
 784 void ProfileSyncService::OnRefreshTokenRevoked(
 785     const std::string& account_id) {
 786   if (!IsOAuthRefreshTokenAvailable()) {
 787     access_token_.clear();
 788     // The additional check around IsOAuthRefreshTokenAvailable() above
 789     // prevents us sounding the alarm if we actually have a valid token but
 790     // a refresh attempt failed for any variety of reasons
 791     // (e.g. flaky network). It's possible the token we do have is also
 792     // invalid, but in that case we should already have (or can expect) an
 793     // auth error sent from the sync backend.
 794     UpdateAuthErrorState(
 795         GoogleServiceAuthError(GoogleServiceAuthError::REQUEST_CANCELED));
 796   }
 797 }
 798
 799 void ProfileSyncService::OnRefreshTokensLoaded() {
 800   // This notification gets fired when OAuth2TokenService loads the tokens
 801   // from storage.
 802   // Initialize the backend if sync is enabled. If the sync token was
 803   // not loaded, GetCredentials() will generate invalid credentials to
 804   // cause the backend to generate an auth error (crbug.com/121755).
 805   if (HasSyncingBackend()) {
 806     RequestAccessToken();
 807   } else {
 808     startup_controller_->TryStart();
 809   }
 810 }
 811
 812 void ProfileSyncService::Shutdown() {
 813   UnregisterAuthNotifications();
 814
 815   ShutdownImpl(syncer::BROWSER_SHUTDOWN);
 816   if (sync_error_controller_) {
 817     // Destroy the SyncErrorController when the service shuts down for good.
 818     RemoveObserver(sync_error_controller_.get());
 819     sync_error_controller_.reset();
 820   }
 821
 822   if (sync_thread_)
 823     sync_thread_->Stop();
 824 }
 825
 826 void ProfileSyncService::ShutdownImpl(syncer::ShutdownReason reason) {
 827   if (!backend_) {
 828     if (reason == syncer::ShutdownReason::DISABLE_SYNC && sync_thread_) {
 829       // If the backend is already shut down when a DISABLE_SYNC happens,
 830       // the data directory needs to be cleaned up here.
 831       sync_thread_->message_loop()->PostTask(FROM_HERE,
 832           base::Bind(&DeleteSyncDataFolder, directory_path_));
 833     }
 834     return;
 835   }
 836
 837   if (reason == syncer::ShutdownReason::STOP_SYNC
 838       || reason == syncer::ShutdownReason::DISABLE_SYNC) {
 839     RemoveClientFromServer();
 840   }
 841
 842   non_blocking_data_type_manager_.DisconnectSyncBackend();
 843
 844   // First, we spin down the backend to stop change processing as soon as
 845   // possible.
 846   base::Time shutdown_start_time = base::Time::Now();
 847   backend_->StopSyncingForShutdown();
 848
 849   // Stop all data type controllers, if needed.  Note that until Stop
 850   // completes, it is possible in theory to have a ChangeProcessor apply a
 851   // change from a native model.  In that case, it will get applied to the sync
 852   // database (which doesn't get destroyed until we destroy the backend below)
 853   // as an unsynced change.  That will be persisted, and committed on restart.
 854   if (directory_data_type_manager_) {
 855     if (directory_data_type_manager_->state() != DataTypeManager::STOPPED) {
 856       // When aborting as part of shutdown, we should expect an aborted sync
 857       // configure result, else we'll dcheck when we try to read the sync error.
 858       expect_sync_configuration_aborted_ = true;
 859       directory_data_type_manager_->Stop();
 860     }
 861     directory_data_type_manager_.reset();
 862   }
 863
 864   // Shutdown the migrator before the backend to ensure it doesn't pull a null
 865   // snapshot.
 866   migrator_.reset();
 867   sync_js_controller_.AttachJsBackend(WeakHandle<syncer::JsBackend>());
 868
 869   // Move aside the backend so nobody else tries to use it while we are
 870   // shutting it down.
 871   scoped_ptr<SyncBackendHost> doomed_backend(backend_.release());
 872   if (doomed_backend) {
 873     sync_thread_ = doomed_backend->Shutdown(reason);
 874     doomed_backend.reset();
 875   }
 876   base::TimeDelta shutdown_time = base::Time::Now() - shutdown_start_time;
 877   UMA_HISTOGRAM_TIMES("Sync.Shutdown.BackendDestroyedTime", shutdown_time);
 878
 879   weak_factory_.InvalidateWeakPtrs();
 880
 881   if (backend_mode_ == SYNC)
 882     startup_controller_->Reset(GetRegisteredDataTypes());
 883
 884   // Don't let backup block sync regardless backup succeeded or not.
 885   if (backend_mode_ == BACKUP)
 886     backup_finished_ = true;
 887
 888   // Sync could be blocked by rollback/backup. Post task to check whether sync
 889   // should start after shutting down rollback/backup backend.
 890   if ((backend_mode_ == ROLLBACK || backend_mode_ == BACKUP) &&
 891       reason != syncer::SWITCH_MODE_SYNC &&
 892       reason != syncer::BROWSER_SHUTDOWN) {
 893     base::MessageLoop::current()->PostTask(
 894         FROM_HERE, base::Bind(&ProfileSyncService::TryStartSyncAfterBackup,
 895                               startup_controller_weak_factory_.GetWeakPtr()));
 896   }
 897
 898   // Clear various flags.
 899   backend_mode_ = IDLE;
 900   expect_sync_configuration_aborted_ = false;
 901   is_auth_in_progress_ = false;
 902   backend_initialized_ = false;
 903   cached_passphrase_.clear();
 904   encryption_pending_ = false;
 905   encrypt_everything_ = false;
 906   encrypted_types_ = syncer::SyncEncryptionHandler::SensitiveTypes();
 907   passphrase_required_reason_ = syncer::REASON_PASSPHRASE_NOT_REQUIRED;
 908   request_access_token_retry_timer_.Stop();
 909   // Revert to "no auth error".
 910   if (last_auth_error_.state() != GoogleServiceAuthError::NONE)
 911     UpdateAuthErrorState(GoogleServiceAuthError::AuthErrorNone());
 912
 913   NotifyObservers();
 914 }
 915
 916 void ProfileSyncService::DisableForUser() {
 917   // Clear prefs (including SyncSetupHasCompleted) before shutting down so
 918   // PSS clients don't think we're set up while we're shutting down.
 919   sync_prefs_.ClearPreferences();
 920   ClearUnrecoverableError();
 921   ShutdownImpl(syncer::DISABLE_SYNC);
 922 }
 923
 924 bool ProfileSyncService::HasSyncSetupCompleted() const {
 925   return sync_prefs_.HasSyncSetupCompleted();
 926 }
 927
 928 void ProfileSyncService::SetSyncSetupCompleted() {
 929   sync_prefs_.SetSyncSetupCompleted();
 930 }
 931
 932 void ProfileSyncService::UpdateLastSyncedTime() {
 933   sync_prefs_.SetLastSyncedTime(base::Time::Now());
 934 }
 935
 936 void ProfileSyncService::NotifyObservers() {
 937   FOR_EACH_OBSERVER(ProfileSyncServiceBase::Observer, observers_,
 938                     OnStateChanged());
 939 }
 940
 941 void ProfileSyncService::NotifySyncCycleCompleted() {
 942   FOR_EACH_OBSERVER(ProfileSyncServiceBase::Observer, observers_,
 943                     OnSyncCycleCompleted());
 944 }
 945
 946 void ProfileSyncService::ClearStaleErrors() {
 947   ClearUnrecoverableError();
 948   last_actionable_error_ = SyncProtocolError();
 949   // Clear the data type errors as well.
 950   if (directory_data_type_manager_.get())
 951     directory_data_type_manager_->ResetDataTypeErrors();
 952
 953 }
 954
 955 void ProfileSyncService::ClearUnrecoverableError() {
 956   unrecoverable_error_reason_ = ERROR_REASON_UNSET;
 957   unrecoverable_error_message_.clear();
 958   unrecoverable_error_location_ = tracked_objects::Location();
 959 }
 960
 961 void ProfileSyncService::RegisterNewDataType(syncer::ModelType data_type) {
 962   if (directory_data_type_controllers_.count(data_type) > 0)
 963     return;
 964   NOTREACHED();
 965 }
 966
 967 // An invariant has been violated.  Transition to an error state where we try
 968 // to do as little work as possible, to avoid further corruption or crashes.
 969 void ProfileSyncService::OnUnrecoverableError(
 970     const tracked_objects::Location& from_here,
 971     const std::string& message) {
 972   // Unrecoverable errors that arrive via the syncer::UnrecoverableErrorHandler
 973   // interface are assumed to originate within the syncer.
 974   unrecoverable_error_reason_ = ERROR_REASON_SYNCER;
 975   OnUnrecoverableErrorImpl(from_here, message, true);
 976 }
 977
 978 void ProfileSyncService::OnUnrecoverableErrorImpl(
 979     const tracked_objects::Location& from_here,
 980     const std::string& message,
 981     bool delete_sync_database) {
 982   DCHECK(HasUnrecoverableError());
 983   unrecoverable_error_message_ = message;
 984   unrecoverable_error_location_ = from_here;
 985
 986   UMA_HISTOGRAM_ENUMERATION(kSyncUnrecoverableErrorHistogram,
 987                             unrecoverable_error_reason_,
 988                             ERROR_REASON_LIMIT);
 989   std::string location;
 990   from_here.Write(true, true, &location);
 991   LOG(ERROR)
 992       << "Unrecoverable error detected at " << location
 993       << " -- ProfileSyncService unusable: " << message;
 994
 995   // Shut all data types down.
 996   base::MessageLoop::current()->PostTask(FROM_HERE,
 997       base::Bind(&ProfileSyncService::ShutdownImpl,
 998                  weak_factory_.GetWeakPtr(),
 999                  delete_sync_database ?
1000                      syncer::DISABLE_SYNC : syncer::STOP_SYNC));
1001 }
1002
1003 void ProfileSyncService::ReenableDatatype(syncer::ModelType type) {
1004   DCHECK(backend_initialized_);
1005   directory_data_type_manager_->ReenableType(type);
1006 }
1007
1008 void ProfileSyncService::UpdateBackendInitUMA(bool success) {
1009   if (backend_mode_ != SYNC)
1010     return;
1011
1012   is_first_time_sync_configure_ = !HasSyncSetupCompleted();
1013
1014   if (is_first_time_sync_configure_) {
1015     UMA_HISTOGRAM_BOOLEAN("Sync.BackendInitializeFirstTimeSuccess", success);
1016   } else {
1017     UMA_HISTOGRAM_BOOLEAN("Sync.BackendInitializeRestoreSuccess", success);
1018   }
1019
1020   base::Time on_backend_initialized_time = base::Time::Now();
1021   base::TimeDelta delta = on_backend_initialized_time -
1022       startup_controller_->start_backend_time();
1023   if (is_first_time_sync_configure_) {
1024     UMA_HISTOGRAM_LONG_TIMES("Sync.BackendInitializeFirstTime", delta);
1025   } else {
1026     UMA_HISTOGRAM_LONG_TIMES("Sync.BackendInitializeRestoreTime", delta);
1027   }
1028 }
1029
1030 void ProfileSyncService::PostBackendInitialization() {
1031   // Never get here for backup / restore.
1032   DCHECK_EQ(backend_mode_, SYNC);
1033
1034   if (last_backup_time_) {
1035     DCHECK(device_info_sync_service_);
1036     device_info_sync_service_->UpdateLocalDeviceBackupTime(*last_backup_time_);
1037   }
1038
1039   if (protocol_event_observers_.might_have_observers()) {
1040     backend_->RequestBufferedProtocolEventsAndEnableForwarding();
1041   }
1042
1043   non_blocking_data_type_manager_.ConnectSyncBackend(
1044       backend_->GetSyncContextProxy());
1045
1046   if (type_debug_info_observers_.might_have_observers()) {
1047     backend_->EnableDirectoryTypeDebugInfoForwarding();
1048   }
1049
1050   // If we have a cached passphrase use it to decrypt/encrypt data now that the
1051   // backend is initialized. We want to call this before notifying observers in
1052   // case this operation affects the "passphrase required" status.
1053   ConsumeCachedPassphraseIfPossible();
1054
1055   // The very first time the backend initializes is effectively the first time
1056   // we can say we successfully "synced".  LastSyncedTime will only be null in
1057   // this case, because the pref wasn't restored on StartUp.
1058   if (sync_prefs_.GetLastSyncedTime().is_null()) {
1059     UpdateLastSyncedTime();
1060   }
1061
1062   if (startup_controller_->auto_start_enabled() && !FirstSetupInProgress()) {
1063     // Backend is initialized but we're not in sync setup, so this must be an
1064     // autostart - mark our sync setup as completed and we'll start syncing
1065     // below.
1066     SetSyncSetupCompleted();
1067   }
1068
1069   // Check HasSyncSetupCompleted() before NotifyObservers() to avoid spurious
1070   // data type configuration because observer may flag setup as complete and
1071   // trigger data type configuration.
1072   if (HasSyncSetupCompleted()) {
1073     ConfigureDataTypeManager();
1074   } else {
1075     DCHECK(FirstSetupInProgress());
1076   }
1077
1078   NotifyObservers();
1079 }
1080
1081 void ProfileSyncService::OnBackendInitialized(
1082     const syncer::WeakHandle<syncer::JsBackend>& js_backend,
1083     const syncer::WeakHandle<syncer::DataTypeDebugInfoListener>&
1084         debug_info_listener,
1085     const std::string& cache_guid,
1086     bool success) {
1087   UpdateBackendInitUMA(success);
1088
1089   if (!success) {
1090     // Something went unexpectedly wrong.  Play it safe: stop syncing at once
1091     // and surface error UI to alert the user sync has stopped.
1092     // Keep the directory around for now so that on restart we will retry
1093     // again and potentially succeed in presence of transient file IO failures
1094     // or permissions issues, etc.
1095     //
1096     // TODO(rlarocque): Consider making this UnrecoverableError less special.
1097     // Unlike every other UnrecoverableError, it does not delete our sync data.
1098     // This exception made sense at the time it was implemented, but our new
1099     // directory corruption recovery mechanism makes it obsolete.  By the time
1100     // we get here, we will have already tried and failed to delete the
1101     // directory.  It would be no big deal if we tried to delete it again.
1102     OnInternalUnrecoverableError(FROM_HERE,
1103                                  "BackendInitialize failure",
1104                                  false,
1105                                  ERROR_REASON_BACKEND_INIT_FAILURE);
1106     return;
1107   }
1108
1109   backend_initialized_ = true;
1110
1111   sync_js_controller_.AttachJsBackend(js_backend);
1112   debug_info_listener_ = debug_info_listener;
1113
1114   SigninClient* signin_client =
1115       ChromeSigninClientFactory::GetForProfile(profile_);
1116   DCHECK(signin_client);
1117   std::string signin_scoped_device_id =
1118       signin_client->GetSigninScopedDeviceId();
1119
1120   // Initialize local device info.
1121   local_device_->Initialize(cache_guid, signin_scoped_device_id);
1122
1123   DVLOG(1) << "Setting preferred types for non-blocking DTM";
1124   non_blocking_data_type_manager_.SetPreferredTypes(GetPreferredDataTypes());
1125
1126   // Give the DataTypeControllers a handle to the now initialized backend
1127   // as a UserShare.
1128   for (DataTypeController::TypeMap::iterator it =
1129        directory_data_type_controllers_.begin();
1130        it != directory_data_type_controllers_.end(); ++it) {
1131     it->second->OnUserShareReady(GetUserShare());
1132   }
1133
1134   if (backend_mode_ == BACKUP || backend_mode_ == ROLLBACK)
1135     ConfigureDataTypeManager();
1136   else
1137     PostBackendInitialization();
1138 }
1139
1140 void ProfileSyncService::OnSyncCycleCompleted() {
1141   UpdateLastSyncedTime();
1142   if (IsDataTypeControllerRunning(syncer::SESSIONS)) {
1143     // Trigger garbage collection of old sessions now that we've downloaded
1144     // any new session data.
1145     base::MessageLoop::current()->PostTask(FROM_HERE, base::Bind(
1146         &SessionsSyncManager::DoGarbageCollection,
1147             base::AsWeakPtr(sessions_sync_manager_.get())));
1148   }
1149   DVLOG(2) << "Notifying observers sync cycle completed";
1150   NotifySyncCycleCompleted();
1151 }
1152
1153 void ProfileSyncService::OnExperimentsChanged(
1154     const syncer::Experiments& experiments) {
1155   if (current_experiments_.Matches(experiments))
1156     return;
1157
1158   current_experiments_ = experiments;
1159
1160   profile()->GetPrefs()->SetBoolean(prefs::kInvalidationServiceUseGCMChannel,
1161                                     experiments.gcm_invalidations_enabled);
1162   profile()->GetPrefs()->SetBoolean(
1163       autofill::prefs::kAutofillWalletSyncExperimentEnabled,
1164       experiments.wallet_sync_enabled);
1165
1166   // If this is a first time sync for a client, this will be called before
1167   // OnBackendInitialized() to ensure the new datatypes are available at sync
1168   // setup. As a result, the migrator won't exist yet. This is fine because for
1169   // first time sync cases we're only concerned with making the datatype
1170   // available.
1171   if (migrator_.get() &&
1172       migrator_->state() != browser_sync::BackendMigrator::IDLE) {
1173     DVLOG(1) << "Dropping OnExperimentsChanged due to migrator busy.";
1174     return;
1175   }
1176
1177   const syncer::ModelTypeSet registered_types = GetRegisteredDataTypes();
1178   syncer::ModelTypeSet to_add;
1179   const syncer::ModelTypeSet to_register =
1180       Difference(to_add, registered_types);
1181   DVLOG(2) << "OnExperimentsChanged called with types: "
1182            << syncer::ModelTypeSetToString(to_add);
1183   DVLOG(2) << "Enabling types: " << syncer::ModelTypeSetToString(to_register);
1184
1185   for (syncer::ModelTypeSet::Iterator it = to_register.First();
1186        it.Good(); it.Inc()) {
1187     // Received notice to enable experimental type. Check if the type is
1188     // registered, and if not register a new datatype controller.
1189     RegisterNewDataType(it.Get());
1190   }
1191
1192   // Check if the user has "Keep Everything Synced" enabled. If so, we want
1193   // to turn on all experimental types if they're not already on. Otherwise we
1194   // leave them off.
1195   // Note: if any types are already registered, we don't turn them on. This
1196   // covers the case where we're already in the process of reconfiguring
1197   // to turn an experimental type on.
1198   if (sync_prefs_.HasKeepEverythingSynced()) {
1199     // Mark all data types as preferred.
1200     sync_prefs_.SetPreferredDataTypes(registered_types, registered_types);
1201
1202     // Only automatically turn on types if we have already finished set up.
1203     // Otherwise, just leave the experimental types on by default.
1204     if (!to_register.Empty() && HasSyncSetupCompleted() && migrator_) {
1205       DVLOG(1) << "Dynamically enabling new datatypes: "
1206                << syncer::ModelTypeSetToString(to_register);
1207       OnMigrationNeededForTypes(to_register);
1208     }
1209   }
1210 }
1211
1212 void ProfileSyncService::UpdateAuthErrorState(const AuthError& error) {
1213   is_auth_in_progress_ = false;
1214   last_auth_error_ = error;
1215
1216   NotifyObservers();
1217 }
1218
1219 namespace {
1220
1221 AuthError ConnectionStatusToAuthError(
1222     syncer::ConnectionStatus status) {
1223   switch (status) {
1224     case syncer::CONNECTION_OK:
1225       return AuthError::AuthErrorNone();
1226       break;
1227     case syncer::CONNECTION_AUTH_ERROR:
1228       return AuthError(AuthError::INVALID_GAIA_CREDENTIALS);
1229       break;
1230     case syncer::CONNECTION_SERVER_ERROR:
1231       return AuthError(AuthError::CONNECTION_FAILED);
1232       break;
1233     default:
1234       NOTREACHED();
1235       return AuthError(AuthError::CONNECTION_FAILED);
1236   }
1237 }
1238
1239 }  // namespace
1240
1241 void ProfileSyncService::OnConnectionStatusChange(
1242     syncer::ConnectionStatus status) {
1243   connection_status_update_time_ = base::Time::Now();
1244   connection_status_ = status;
1245   if (status == syncer::CONNECTION_AUTH_ERROR) {
1246     // Sync server returned error indicating that access token is invalid. It
1247     // could be either expired or access is revoked. Let's request another
1248     // access token and if access is revoked then request for token will fail
1249     // with corresponding error. If access token is repeatedly reported
1250     // invalid, there may be some issues with server, e.g. authentication
1251     // state is inconsistent on sync and token server. In that case, we
1252     // backoff token requests exponentially to avoid hammering token server
1253     // too much and to avoid getting same token due to token server's caching
1254     // policy. |request_access_token_retry_timer_| is used to backoff request
1255     // triggered by both auth error and failure talking to GAIA server.
1256     // Therefore, we're likely to reach the backoff ceiling more quickly than
1257     // you would expect from looking at the BackoffPolicy if both types of
1258     // errors happen. We shouldn't receive two errors back-to-back without
1259     // attempting a token/sync request in between, thus crank up request delay
1260     // unnecessary. This is because we won't make a sync request if we hit an
1261     // error until GAIA succeeds at sending a new token, and we won't request
1262     // a new token unless sync reports a token failure. But to be safe, don't
1263     // schedule request if this happens.
1264     if (request_access_token_retry_timer_.IsRunning()) {
1265       // The timer to perform a request later is already running; nothing
1266       // further needs to be done at this point.
1267     } else if (request_access_token_backoff_.failure_count() == 0) {
1268       // First time request without delay. Currently invalid token is used
1269       // to initialize sync backend and we'll always end up here. We don't
1270       // want to delay initialization.
1271       request_access_token_backoff_.InformOfRequest(false);
1272       RequestAccessToken();
1273     } else  {
1274       request_access_token_backoff_.InformOfRequest(false);
1275       request_access_token_retry_timer_.Start(
1276           FROM_HERE,
1277           request_access_token_backoff_.GetTimeUntilRelease(),
1278           base::Bind(&ProfileSyncService::RequestAccessToken,
1279                      weak_factory_.GetWeakPtr()));
1280     }
1281   } else {
1282     // Reset backoff time after successful connection.
1283     if (status == syncer::CONNECTION_OK) {
1284       // Request shouldn't be scheduled at this time. But if it is, it's
1285       // possible that sync flips between OK and auth error states rapidly,
1286       // thus hammers token server. To be safe, only reset backoff delay when
1287       // no scheduled request.
1288       if (request_access_token_retry_timer_.IsRunning()) {
1289         NOTREACHED();
1290       } else {
1291         request_access_token_backoff_.Reset();
1292       }
1293     }
1294
1295     const GoogleServiceAuthError auth_error =
1296         ConnectionStatusToAuthError(status);
1297     DVLOG(1) << "Connection status change: " << auth_error.ToString();
1298     UpdateAuthErrorState(auth_error);
1299   }
1300 }
1301
1302 void ProfileSyncService::StopSyncingPermanently() {
1303   sync_prefs_.SetStartSuppressed(true);
1304   DisableForUser();
1305 }
1306
1307 void ProfileSyncService::OnPassphraseRequired(
1308     syncer::PassphraseRequiredReason reason,
1309     const sync_pb::EncryptedData& pending_keys) {
1310   DCHECK(backend_.get());
1311   DCHECK(backend_->IsNigoriEnabled());
1312
1313   // TODO(lipalani) : add this check to other locations as well.
1314   if (HasUnrecoverableError()) {
1315     // When unrecoverable error is detected we post a task to shutdown the
1316     // backend. The task might not have executed yet.
1317     return;
1318   }
1319
1320   DVLOG(1) << "Passphrase required with reason: "
1321            << syncer::PassphraseRequiredReasonToString(reason);
1322   passphrase_required_reason_ = reason;
1323
1324   const syncer::ModelTypeSet types = GetPreferredDirectoryDataTypes();
1325   if (directory_data_type_manager_) {
1326     // Reconfigure without the encrypted types (excluded implicitly via the
1327     // failed datatypes handler).
1328     directory_data_type_manager_->Configure(types,
1329                                             syncer::CONFIGURE_REASON_CRYPTO);
1330   }
1331
1332   // TODO(rlarocque): Support non-blocking types.  http://crbug.com/351005.
1333
1334   // Notify observers that the passphrase status may have changed.
1335   NotifyObservers();
1336 }
1337
1338 void ProfileSyncService::OnPassphraseAccepted() {
1339   DVLOG(1) << "Received OnPassphraseAccepted.";
1340
1341   // If the pending keys were resolved via keystore, it's possible we never
1342   // consumed our cached passphrase. Clear it now.
1343   if (!cached_passphrase_.empty())
1344     cached_passphrase_.clear();
1345
1346   // Reset passphrase_required_reason_ since we know we no longer require the
1347   // passphrase. We do this here rather than down in ResolvePassphraseRequired()
1348   // because that can be called by OnPassphraseRequired() if no encrypted data
1349   // types are enabled, and we don't want to clobber the true passphrase error.
1350   passphrase_required_reason_ = syncer::REASON_PASSPHRASE_NOT_REQUIRED;
1351
1352   // Make sure the data types that depend on the passphrase are started at
1353   // this time.
1354   const syncer::ModelTypeSet types = GetPreferredDirectoryDataTypes();
1355   if (directory_data_type_manager_) {
1356     // Re-enable any encrypted types if necessary.
1357     directory_data_type_manager_->Configure(types,
1358                                             syncer::CONFIGURE_REASON_CRYPTO);
1359   }
1360
1361   // TODO(rlarocque): Support non-blocking types.  http://crbug.com/351005.
1362
1363   NotifyObservers();
1364 }
1365
1366 void ProfileSyncService::OnEncryptedTypesChanged(
1367     syncer::ModelTypeSet encrypted_types,
1368     bool encrypt_everything) {
1369   encrypted_types_ = encrypted_types;
1370   encrypt_everything_ = encrypt_everything;
1371   DCHECK(encrypt_everything_allowed_ || !encrypt_everything_);
1372   DVLOG(1) << "Encrypted types changed to "
1373            << syncer::ModelTypeSetToString(encrypted_types_)
1374            << " (encrypt everything is set to "
1375            << (encrypt_everything_ ? "true" : "false") << ")";
1376   DCHECK(encrypted_types_.Has(syncer::PASSWORDS));
1377
1378   NotifyObservers();
1379 }
1380
1381 void ProfileSyncService::OnEncryptionComplete() {
1382   DVLOG(1) << "Encryption complete";
1383   if (encryption_pending_ && encrypt_everything_) {
1384     encryption_pending_ = false;
1385     // This is to nudge the integration tests when encryption is
1386     // finished.
1387     NotifyObservers();
1388   }
1389 }
1390
1391 void ProfileSyncService::OnMigrationNeededForTypes(
1392     syncer::ModelTypeSet types) {
1393   DCHECK(backend_initialized_);
1394   DCHECK(directory_data_type_manager_.get());
1395
1396   // Migrator must be valid, because we don't sync until it is created and this
1397   // callback originates from a sync cycle.
1398   migrator_->MigrateTypes(types);
1399 }
1400
1401 void ProfileSyncService::OnActionableError(const SyncProtocolError& error) {
1402   last_actionable_error_ = error;
1403   DCHECK_NE(last_actionable_error_.action,
1404             syncer::UNKNOWN_ACTION);
1405   switch (error.action) {
1406     case syncer::UPGRADE_CLIENT:
1407     case syncer::CLEAR_USER_DATA_AND_RESYNC:
1408     case syncer::ENABLE_SYNC_ON_ACCOUNT:
1409     case syncer::STOP_AND_RESTART_SYNC:
1410       // TODO(lipalani) : if setup in progress we want to display these
1411       // actions in the popup. The current experience might not be optimal for
1412       // the user. We just dismiss the dialog.
1413       if (startup_controller_->setup_in_progress()) {
1414         StopSyncingPermanently();
1415         expect_sync_configuration_aborted_ = true;
1416       }
1417       // Trigger an unrecoverable error to stop syncing.
1418       OnInternalUnrecoverableError(FROM_HERE,
1419                                    last_actionable_error_.error_description,
1420                                    true,
1421                                    ERROR_REASON_ACTIONABLE_ERROR);
1422       break;
1423     case syncer::DISABLE_SYNC_AND_ROLLBACK:
1424       backup_rollback_controller_->OnRollbackReceived();
1425       // Fall through to shutdown backend and sign user out.
1426     case syncer::DISABLE_SYNC_ON_CLIENT:
1427       StopSyncingPermanently();
1428 #if !defined(OS_CHROMEOS)
1429       // On desktop Chrome, sign out the user after a dashboard clear.
1430       // Skip sign out on ChromeOS/Android.
1431       if (!startup_controller_->auto_start_enabled()) {
1432         SigninManagerFactory::GetForProfile(profile_)->SignOut(
1433             signin_metrics::SERVER_FORCED_DISABLE);
1434       }
1435 #endif
1436       break;
1437     case syncer::ROLLBACK_DONE:
1438       backup_rollback_controller_->OnRollbackDone();
1439       break;
1440     case syncer::STOP_SYNC_FOR_DISABLED_ACCOUNT:
1441       // Sync disabled by domain admin. we should stop syncing until next
1442       // restart.
1443       sync_disabled_by_admin_ = true;
1444       ShutdownImpl(syncer::DISABLE_SYNC);
1445       break;
1446     default:
1447       NOTREACHED();
1448   }
1449   NotifyObservers();
1450
1451   if (error.action == syncer::DISABLE_SYNC_ON_CLIENT ||
1452       (error.action == syncer::DISABLE_SYNC_AND_ROLLBACK &&
1453           !backup_rollback_controller_->StartRollback())) {
1454     // Clean up backup data for sign-out only or when rollback is disabled.
1455     CleanUpBackup();
1456   } else if (error.action == syncer::ROLLBACK_DONE) {
1457     // Shut down ROLLBACK backend and delete backup DB.
1458     ShutdownImpl(syncer::DISABLE_SYNC);
1459     sync_prefs_.ClearFirstSyncTime();
1460   }
1461 }
1462
1463 void ProfileSyncService::OnConfigureDone(
1464     const DataTypeManager::ConfigureResult& result) {
1465   configure_status_ = result.status;
1466   data_type_status_table_ = result.data_type_status_table;
1467
1468   if (backend_mode_ != SYNC) {
1469     if (configure_status_ == DataTypeManager::OK) {
1470       StartSyncingWithServer();
1471
1472       // Backup is done after models are associated.
1473       if (backend_mode_ == BACKUP)
1474         backup_finished_ = true;
1475
1476       // Asynchronously check whether sync needs to start.
1477       base::MessageLoop::current()->PostTask(
1478           FROM_HERE, base::Bind(&ProfileSyncService::TryStartSyncAfterBackup,
1479                                 startup_controller_weak_factory_.GetWeakPtr()));
1480     } else if (!expect_sync_configuration_aborted_) {
1481       DVLOG(1) << "Backup/rollback backend failed to configure.";
1482       ShutdownImpl(syncer::STOP_SYNC);
1483     }
1484
1485     return;
1486   }
1487
1488   // We should have cleared our cached passphrase before we get here (in
1489   // OnBackendInitialized()).
1490   DCHECK(cached_passphrase_.empty());
1491
1492   if (!sync_configure_start_time_.is_null()) {
1493     if (result.status == DataTypeManager::OK) {
1494       base::Time sync_configure_stop_time = base::Time::Now();
1495       base::TimeDelta delta = sync_configure_stop_time -
1496           sync_configure_start_time_;
1497       if (is_first_time_sync_configure_) {
1498         UMA_HISTOGRAM_LONG_TIMES("Sync.ServiceInitialConfigureTime", delta);
1499       } else {
1500         UMA_HISTOGRAM_LONG_TIMES("Sync.ServiceSubsequentConfigureTime",
1501                                   delta);
1502       }
1503     }
1504     sync_configure_start_time_ = base::Time();
1505   }
1506
1507   // Notify listeners that configuration is done.
1508   content::NotificationService::current()->Notify(
1509       chrome::NOTIFICATION_SYNC_CONFIGURE_DONE,
1510       content::Source<ProfileSyncService>(this),
1511       content::NotificationService::NoDetails());
1512
1513   DVLOG(1) << "PSS OnConfigureDone called with status: " << configure_status_;
1514   // The possible status values:
1515   //    ABORT - Configuration was aborted. This is not an error, if
1516   //            initiated by user.
1517   //    OK - Some or all types succeeded.
1518   //    Everything else is an UnrecoverableError. So treat it as such.
1519
1520   // First handle the abort case.
1521   if (configure_status_ == DataTypeManager::ABORTED &&
1522       expect_sync_configuration_aborted_) {
1523     DVLOG(0) << "ProfileSyncService::Observe Sync Configure aborted";
1524     expect_sync_configuration_aborted_ = false;
1525     return;
1526   }
1527
1528   // Handle unrecoverable error.
1529   if (configure_status_ != DataTypeManager::OK) {
1530     // Something catastrophic had happened. We should only have one
1531     // error representing it.
1532     syncer::SyncError error =
1533         data_type_status_table_.GetUnrecoverableError();
1534     DCHECK(error.IsSet());
1535     std::string message =
1536         "Sync configuration failed with status " +
1537         DataTypeManager::ConfigureStatusToString(configure_status_) +
1538         " caused by " +
1539         syncer::ModelTypeSetToString(
1540             data_type_status_table_.GetUnrecoverableErrorTypes()) +
1541         ": " + error.message();
1542     LOG(ERROR) << "ProfileSyncService error: " << message;
1543     OnInternalUnrecoverableError(error.location(),
1544                                  message,
1545                                  true,
1546                                  ERROR_REASON_CONFIGURATION_FAILURE);
1547     return;
1548   }
1549
1550   // We should never get in a state where we have no encrypted datatypes
1551   // enabled, and yet we still think we require a passphrase for decryption.
1552   DCHECK(!(IsPassphraseRequiredForDecryption() &&
1553            !IsEncryptedDatatypeEnabled()));
1554
1555   // This must be done before we start syncing with the server to avoid
1556   // sending unencrypted data up on a first time sync.
1557   if (encryption_pending_)
1558     backend_->EnableEncryptEverything();
1559   NotifyObservers();
1560
1561   if (migrator_.get() &&
1562       migrator_->state() != browser_sync::BackendMigrator::IDLE) {
1563     // Migration in progress.  Let the migrator know we just finished
1564     // configuring something.  It will be up to the migrator to call
1565     // StartSyncingWithServer() if migration is now finished.
1566     migrator_->OnConfigureDone(result);
1567   } else {
1568     StartSyncingWithServer();
1569   }
1570 }
1571
1572 void ProfileSyncService::OnConfigureStart() {
1573   sync_configure_start_time_ = base::Time::Now();
1574   NotifyObservers();
1575 }
1576
1577 ProfileSyncService::SyncStatusSummary
1578       ProfileSyncService::QuerySyncStatusSummary() {
1579   if (HasUnrecoverableError()) {
1580     return UNRECOVERABLE_ERROR;
1581   } else if (!backend_) {
1582     return NOT_ENABLED;
1583   } else if (backend_mode_ == BACKUP) {
1584     return BACKUP_USER_DATA;
1585   } else if (backend_mode_ == ROLLBACK) {
1586     return ROLLBACK_USER_DATA;
1587   } else if (backend_.get() && !HasSyncSetupCompleted()) {
1588     return SETUP_INCOMPLETE;
1589   } else if (
1590       backend_.get() && HasSyncSetupCompleted() &&
1591       directory_data_type_manager_.get() &&
1592       directory_data_type_manager_->state() == DataTypeManager::STOPPED) {
1593     return DATATYPES_NOT_INITIALIZED;
1594   } else if (SyncActive()) {
1595     return INITIALIZED;
1596   }
1597   return UNKNOWN_ERROR;
1598 }
1599
1600 std::string ProfileSyncService::QuerySyncStatusSummaryString() {
1601   SyncStatusSummary status = QuerySyncStatusSummary();
1602
1603   std::string config_status_str =
1604       configure_status_ != DataTypeManager::UNKNOWN ?
1605           DataTypeManager::ConfigureStatusToString(configure_status_) : "";
1606
1607   switch (status) {
1608     case UNRECOVERABLE_ERROR:
1609       return "Unrecoverable error detected";
1610     case NOT_ENABLED:
1611       return "Syncing not enabled";
1612     case SETUP_INCOMPLETE:
1613       return "First time sync setup incomplete";
1614     case DATATYPES_NOT_INITIALIZED:
1615       return "Datatypes not fully initialized";
1616     case INITIALIZED:
1617       return "Sync service initialized";
1618     case BACKUP_USER_DATA:
1619       return "Backing-up user data. Status: " + config_status_str;
1620     case ROLLBACK_USER_DATA:
1621       return "Restoring user data. Status: " + config_status_str;
1622     default:
1623       return "Status unknown: Internal error?";
1624   }
1625 }
1626
1627 std::string ProfileSyncService::GetBackendInitializationStateString() const {
1628   return startup_controller_->GetBackendInitializationStateString();
1629 }
1630
1631 bool ProfileSyncService::auto_start_enabled() const {
1632   return startup_controller_->auto_start_enabled();
1633 }
1634
1635 bool ProfileSyncService::setup_in_progress() const {
1636   return startup_controller_->setup_in_progress();
1637 }
1638
1639 bool ProfileSyncService::QueryDetailedSyncStatus(
1640     SyncBackendHost::Status* result) {
1641   if (backend_.get() && backend_initialized_) {
1642     *result = backend_->GetDetailedStatus();
1643     return true;
1644   } else {
1645     SyncBackendHost::Status status;
1646     status.sync_protocol_error = last_actionable_error_;
1647     *result = status;
1648     return false;
1649   }
1650 }
1651
1652 const AuthError& ProfileSyncService::GetAuthError() const {
1653   return last_auth_error_;
1654 }
1655
1656 bool ProfileSyncService::FirstSetupInProgress() const {
1657   return !HasSyncSetupCompleted() && startup_controller_->setup_in_progress();
1658 }
1659
1660 void ProfileSyncService::SetSetupInProgress(bool setup_in_progress) {
1661   // This method is a no-op if |setup_in_progress_| remains unchanged.
1662   if (startup_controller_->setup_in_progress() == setup_in_progress)
1663     return;
1664
1665   startup_controller_->set_setup_in_progress(setup_in_progress);
1666   if (!setup_in_progress && backend_initialized())
1667     ReconfigureDatatypeManager();
1668   NotifyObservers();
1669 }
1670
1671 bool ProfileSyncService::SyncActive() const {
1672   return backend_initialized_ && backend_mode_ == SYNC &&
1673          directory_data_type_manager_ &&
1674          directory_data_type_manager_->state() != DataTypeManager::STOPPED;
1675 }
1676
1677 bool ProfileSyncService::backend_initialized() const {
1678   return backend_initialized_;
1679 }
1680
1681 ProfileSyncService::BackendMode ProfileSyncService::backend_mode() const {
1682   return backend_mode_;
1683 }
1684
1685 bool ProfileSyncService::ConfigurationDone() const {
1686   return directory_data_type_manager_ &&
1687       directory_data_type_manager_->state() == DataTypeManager::CONFIGURED;
1688 }
1689
1690 bool ProfileSyncService::waiting_for_auth() const {
1691   return is_auth_in_progress_;
1692 }
1693
1694 const syncer::Experiments& ProfileSyncService::current_experiments() const {
1695   return current_experiments_;
1696 }
1697
1698 bool ProfileSyncService::HasUnrecoverableError() const {
1699   return unrecoverable_error_reason_ != ERROR_REASON_UNSET;
1700 }
1701
1702 bool ProfileSyncService::IsPassphraseRequired() const {
1703   return passphrase_required_reason_ !=
1704       syncer::REASON_PASSPHRASE_NOT_REQUIRED;
1705 }
1706
1707 bool ProfileSyncService::IsPassphraseRequiredForDecryption() const {
1708   // If there is an encrypted datatype enabled and we don't have the proper
1709   // passphrase, we must prompt the user for a passphrase. The only way for the
1710   // user to avoid entering their passphrase is to disable the encrypted types.
1711   return IsEncryptedDatatypeEnabled() && IsPassphraseRequired();
1712 }
1713
1714 base::string16 ProfileSyncService::GetLastSyncedTimeString() const {
1715   const base::Time last_synced_time = sync_prefs_.GetLastSyncedTime();
1716   if (last_synced_time.is_null())
1717     return l10n_util::GetStringUTF16(IDS_SYNC_TIME_NEVER);
1718
1719   base::TimeDelta time_since_last_sync = base::Time::Now() - last_synced_time;
1720
1721   if (time_since_last_sync < base::TimeDelta::FromMinutes(1))
1722     return l10n_util::GetStringUTF16(IDS_SYNC_TIME_JUST_NOW);
1723
1724   return ui::TimeFormat::Simple(ui::TimeFormat::FORMAT_ELAPSED,
1725                                 ui::TimeFormat::LENGTH_SHORT,
1726                                 time_since_last_sync);
1727 }
1728
1729 void ProfileSyncService::UpdateSelectedTypesHistogram(
1730     bool sync_everything, const syncer::ModelTypeSet chosen_types) const {
1731   if (!HasSyncSetupCompleted() ||
1732       sync_everything != sync_prefs_.HasKeepEverythingSynced()) {
1733     UMA_HISTOGRAM_BOOLEAN("Sync.SyncEverything", sync_everything);
1734   }
1735
1736   // Only log the data types that are shown in the sync settings ui.
1737   // Note: the order of these types must match the ordering of
1738   // the respective types in ModelType
1739   const sync_driver::user_selectable_type::UserSelectableSyncType
1740       user_selectable_types[] = {
1741     sync_driver::user_selectable_type::BOOKMARKS,
1742     sync_driver::user_selectable_type::PREFERENCES,
1743     sync_driver::user_selectable_type::PASSWORDS,
1744     sync_driver::user_selectable_type::AUTOFILL,
1745     sync_driver::user_selectable_type::THEMES,
1746     sync_driver::user_selectable_type::TYPED_URLS,
1747     sync_driver::user_selectable_type::EXTENSIONS,
1748     sync_driver::user_selectable_type::APPS,
1749     sync_driver::user_selectable_type::WIFI_CREDENTIAL,
1750     sync_driver::user_selectable_type::PROXY_TABS,
1751   };
1752
1753   static_assert(35 == syncer::MODEL_TYPE_COUNT,
1754                 "custom config histogram must be updated");
1755
1756   if (!sync_everything) {
1757     const syncer::ModelTypeSet current_types = GetPreferredDataTypes();
1758
1759     syncer::ModelTypeSet type_set = syncer::UserSelectableTypes();
1760     syncer::ModelTypeSet::Iterator it = type_set.First();
1761
1762     DCHECK_EQ(arraysize(user_selectable_types), type_set.Size());
1763
1764     for (size_t i = 0; i < arraysize(user_selectable_types) && it.Good();
1765          ++i, it.Inc()) {
1766       const syncer::ModelType type = it.Get();
1767       if (chosen_types.Has(type) &&
1768           (!HasSyncSetupCompleted() || !current_types.Has(type))) {
1769         // Selected type has changed - log it.
1770         UMA_HISTOGRAM_ENUMERATION(
1771             "Sync.CustomSync",
1772             user_selectable_types[i],
1773             sync_driver::user_selectable_type::SELECTABLE_DATATYPE_COUNT + 1);
1774       }
1775     }
1776   }
1777 }
1778
1779 #if defined(OS_CHROMEOS)
1780 void ProfileSyncService::RefreshSpareBootstrapToken(
1781     const std::string& passphrase) {
1782   sync_driver::SystemEncryptor encryptor;
1783   syncer::Cryptographer temp_cryptographer(&encryptor);
1784   // The first 2 params (hostname and username) doesn't have any effect here.
1785   syncer::KeyParams key_params = {"localhost", "dummy", passphrase};
1786
1787   std::string bootstrap_token;
1788   if (!temp_cryptographer.AddKey(key_params)) {
1789     NOTREACHED() << "Failed to add key to cryptographer.";
1790   }
1791   temp_cryptographer.GetBootstrapToken(&bootstrap_token);
1792   sync_prefs_.SetSpareBootstrapToken(bootstrap_token);
1793 }
1794 #endif
1795
1796 void ProfileSyncService::OnUserChoseDatatypes(
1797     bool sync_everything,
1798     syncer::ModelTypeSet chosen_types) {
1799   if (!backend_.get() && !HasUnrecoverableError()) {
1800     NOTREACHED();
1801     return;
1802   }
1803
1804   UpdateSelectedTypesHistogram(sync_everything, chosen_types);
1805   sync_prefs_.SetKeepEverythingSynced(sync_everything);
1806
1807   if (directory_data_type_manager_.get())
1808     directory_data_type_manager_->ResetDataTypeErrors();
1809   ChangePreferredDataTypes(chosen_types);
1810 }
1811
1812 void ProfileSyncService::ChangePreferredDataTypes(
1813     syncer::ModelTypeSet preferred_types) {
1814
1815   DVLOG(1) << "ChangePreferredDataTypes invoked";
1816   const syncer::ModelTypeSet registered_types = GetRegisteredDataTypes();
1817   const syncer::ModelTypeSet registered_preferred_types =
1818       Intersection(registered_types, preferred_types);
1819   sync_prefs_.SetPreferredDataTypes(registered_types,
1820                                     registered_preferred_types);
1821
1822   // Now reconfigure the DTM.
1823   ReconfigureDatatypeManager();
1824
1825   // TODO(rlarocque): Reconfigure the NonBlockingDataTypeManager, too.  Blocked
1826   // on crbug.com/368834.  Until that bug is fixed, it's difficult to tell
1827   // which types should be enabled and when.
1828 }
1829
1830 syncer::ModelTypeSet ProfileSyncService::GetActiveDataTypes() const {
1831   if (!SyncActive() || !ConfigurationDone())
1832     return syncer::ModelTypeSet();
1833   const syncer::ModelTypeSet preferred_types = GetPreferredDataTypes();
1834   const syncer::ModelTypeSet failed_types =
1835       data_type_status_table_.GetFailedTypes();
1836   return Difference(preferred_types, failed_types);
1837 }
1838
1839 syncer::ModelTypeSet ProfileSyncService::GetPreferredDataTypes() const {
1840   const syncer::ModelTypeSet registered_types = GetRegisteredDataTypes();
1841   const syncer::ModelTypeSet preferred_types =
1842       sync_prefs_.GetPreferredDataTypes(registered_types);
1843   const syncer::ModelTypeSet enforced_types =
1844       Intersection(GetDataTypesFromPreferenceProviders(), registered_types);
1845   return Union(preferred_types, enforced_types);
1846 }
1847
1848 syncer::ModelTypeSet
1849 ProfileSyncService::GetPreferredDirectoryDataTypes() const {
1850   const syncer::ModelTypeSet registered_directory_types =
1851       GetRegisteredDirectoryDataTypes();
1852   const syncer::ModelTypeSet preferred_types =
1853       sync_prefs_.GetPreferredDataTypes(registered_directory_types);
1854   const syncer::ModelTypeSet enforced_types =
1855       Intersection(GetDataTypesFromPreferenceProviders(),
1856                    registered_directory_types);
1857   return Union(preferred_types, enforced_types);
1858 }
1859
1860 syncer::ModelTypeSet
1861 ProfileSyncService::GetPreferredNonBlockingDataTypes() const {
1862   return sync_prefs_.GetPreferredDataTypes(GetRegisteredNonBlockingDataTypes());
1863 }
1864
1865 syncer::ModelTypeSet ProfileSyncService::GetForcedDataTypes() const {
1866   // TODO(treib,zea): When SyncPrefs also implements SyncTypePreferenceProvider,
1867   // we'll need another way to distinguish user-choosable types from
1868   // programmatically-enabled types.
1869   return GetDataTypesFromPreferenceProviders();
1870 }
1871
1872 syncer::ModelTypeSet ProfileSyncService::GetRegisteredDataTypes() const {
1873   return Union(GetRegisteredDirectoryDataTypes(),
1874                GetRegisteredNonBlockingDataTypes());
1875 }
1876
1877 syncer::ModelTypeSet
1878 ProfileSyncService::GetRegisteredDirectoryDataTypes() const {
1879   syncer::ModelTypeSet registered_types;
1880   // The directory_data_type_controllers_ are determined by command-line flags;
1881   // that's effectively what controls the values returned here.
1882   for (DataTypeController::TypeMap::const_iterator it =
1883        directory_data_type_controllers_.begin();
1884        it != directory_data_type_controllers_.end(); ++it) {
1885     registered_types.Put(it->first);
1886   }
1887   return registered_types;
1888 }
1889
1890 syncer::ModelTypeSet
1891 ProfileSyncService::GetRegisteredNonBlockingDataTypes() const {
1892   return non_blocking_data_type_manager_.GetRegisteredTypes();
1893 }
1894
1895 bool ProfileSyncService::IsUsingSecondaryPassphrase() const {
1896   syncer::PassphraseType passphrase_type = GetPassphraseType();
1897   return passphrase_type == syncer::FROZEN_IMPLICIT_PASSPHRASE ||
1898          passphrase_type == syncer::CUSTOM_PASSPHRASE;
1899 }
1900
1901 syncer::PassphraseType ProfileSyncService::GetPassphraseType() const {
1902   return backend_->GetPassphraseType();
1903 }
1904
1905 base::Time ProfileSyncService::GetExplicitPassphraseTime() const {
1906   return backend_->GetExplicitPassphraseTime();
1907 }
1908
1909 bool ProfileSyncService::IsCryptographerReady(
1910     const syncer::BaseTransaction* trans) const {
1911   return backend_.get() && backend_->IsCryptographerReady(trans);
1912 }
1913
1914 void ProfileSyncService::ConfigurePriorityDataTypes() {
1915   const syncer::ModelTypeSet priority_types =
1916       Intersection(GetPreferredDirectoryDataTypes(),
1917                    syncer::PriorityUserTypes());
1918   if (!priority_types.Empty()) {
1919     const syncer::ConfigureReason reason = HasSyncSetupCompleted() ?
1920         syncer::CONFIGURE_REASON_RECONFIGURATION :
1921         syncer::CONFIGURE_REASON_NEW_CLIENT;
1922     directory_data_type_manager_->Configure(priority_types, reason);
1923   }
1924 }
1925
1926 void ProfileSyncService::ConfigureDataTypeManager() {
1927   // Don't configure datatypes if the setup UI is still on the screen - this
1928   // is to help multi-screen setting UIs (like iOS) where they don't want to
1929   // start syncing data until the user is done configuring encryption options,
1930   // etc. ReconfigureDatatypeManager() will get called again once the UI calls
1931   // SetSetupInProgress(false).
1932   if (backend_mode_ == SYNC && startup_controller_->setup_in_progress())
1933     return;
1934
1935   bool restart = false;
1936   if (!directory_data_type_manager_) {
1937     restart = true;
1938     directory_data_type_manager_.reset(
1939         factory_->CreateDataTypeManager(debug_info_listener_,
1940                                         &directory_data_type_controllers_,
1941                                         this,
1942                                         backend_.get(),
1943                                         this));
1944
1945     // We create the migrator at the same time.
1946     migrator_.reset(
1947         new browser_sync::BackendMigrator(
1948             profile_->GetDebugName(), GetUserShare(),
1949             this, directory_data_type_manager_.get(),
1950             base::Bind(&ProfileSyncService::StartSyncingWithServer,
1951                        base::Unretained(this))));
1952   }
1953
1954   syncer::ModelTypeSet types;
1955   syncer::ConfigureReason reason = syncer::CONFIGURE_REASON_UNKNOWN;
1956   if (backend_mode_ == BACKUP || backend_mode_ == ROLLBACK) {
1957     types = syncer::BackupTypes();
1958     reason = syncer::CONFIGURE_REASON_BACKUP_ROLLBACK;
1959   } else {
1960     types = GetPreferredDirectoryDataTypes();
1961     if (!HasSyncSetupCompleted()) {
1962       reason = syncer::CONFIGURE_REASON_NEW_CLIENT;
1963     } else if (restart) {
1964       // Datatype downloads on restart are generally due to newly supported
1965       // datatypes (although it's also possible we're picking up where a failed
1966       // previous configuration left off).
1967       // TODO(sync): consider detecting configuration recovery and setting
1968       // the reason here appropriately.
1969       reason = syncer::CONFIGURE_REASON_NEWLY_ENABLED_DATA_TYPE;
1970     } else {
1971       // The user initiated a reconfiguration (either to add or remove types).
1972       reason = syncer::CONFIGURE_REASON_RECONFIGURATION;
1973     }
1974   }
1975
1976   directory_data_type_manager_->Configure(types, reason);
1977 }
1978
1979 syncer::UserShare* ProfileSyncService::GetUserShare() const {
1980   if (backend_.get() && backend_initialized_) {
1981     return backend_->GetUserShare();
1982   }
1983   NOTREACHED();
1984   return NULL;
1985 }
1986
1987 syncer::sessions::SyncSessionSnapshot
1988 ProfileSyncService::GetLastSessionSnapshot() const {
1989   if (backend_)
1990     return backend_->GetLastSessionSnapshot();
1991   return syncer::sessions::SyncSessionSnapshot();
1992 }
1993
1994 bool ProfileSyncService::HasUnsyncedItems() const {
1995   if (HasSyncingBackend() && backend_initialized_) {
1996     return backend_->HasUnsyncedItems();
1997   }
1998   NOTREACHED();
1999   return false;
2000 }
2001
2002 browser_sync::BackendMigrator*
2003 ProfileSyncService::GetBackendMigratorForTest() {
2004   return migrator_.get();
2005 }
2006
2007 void ProfileSyncService::GetModelSafeRoutingInfo(
2008     syncer::ModelSafeRoutingInfo* out) const {
2009   if (backend_.get() && backend_initialized_) {
2010     backend_->GetModelSafeRoutingInfo(out);
2011   } else {
2012     NOTREACHED();
2013   }
2014 }
2015
2016 base::Value* ProfileSyncService::GetTypeStatusMap() const {
2017   scoped_ptr<base::ListValue> result(new base::ListValue());
2018
2019   if (!backend_.get() || !backend_initialized_) {
2020     return result.release();
2021   }
2022
2023   DataTypeStatusTable::TypeErrorMap error_map =
2024       data_type_status_table_.GetAllErrors();
2025   ModelTypeSet active_types;
2026   ModelTypeSet passive_types;
2027   ModelSafeRoutingInfo routing_info;
2028   backend_->GetModelSafeRoutingInfo(&routing_info);
2029   for (ModelSafeRoutingInfo::const_iterator it = routing_info.begin();
2030        it != routing_info.end(); ++it) {
2031     if (it->second == syncer::GROUP_PASSIVE) {
2032       passive_types.Put(it->first);
2033     } else {
2034       active_types.Put(it->first);
2035     }
2036   }
2037
2038   SyncBackendHost::Status detailed_status = backend_->GetDetailedStatus();
2039   ModelTypeSet &throttled_types(detailed_status.throttled_types);
2040   ModelTypeSet registered = GetRegisteredDataTypes();
2041   scoped_ptr<base::DictionaryValue> type_status_header(
2042       new base::DictionaryValue());
2043
2044   type_status_header->SetString("name", "Model Type");
2045   type_status_header->SetString("status", "header");
2046   type_status_header->SetString("value", "Group Type");
2047   type_status_header->SetString("num_entries", "Total Entries");
2048   type_status_header->SetString("num_live", "Live Entries");
2049   result->Append(type_status_header.release());
2050
2051   scoped_ptr<base::DictionaryValue> type_status;
2052   for (ModelTypeSet::Iterator it = registered.First(); it.Good(); it.Inc()) {
2053     ModelType type = it.Get();
2054
2055     type_status.reset(new base::DictionaryValue());
2056     type_status->SetString("name", ModelTypeToString(type));
2057
2058     if (error_map.find(type) != error_map.end()) {
2059       const syncer::SyncError &error = error_map.find(type)->second;
2060       DCHECK(error.IsSet());
2061       switch (error.GetSeverity()) {
2062         case syncer::SyncError::SYNC_ERROR_SEVERITY_ERROR: {
2063             std::string error_text = "Error: " + error.location().ToString() +
2064                 ", " + error.GetMessagePrefix() + error.message();
2065             type_status->SetString("status", "error");
2066             type_status->SetString("value", error_text);
2067           }
2068           break;
2069         case syncer::SyncError::SYNC_ERROR_SEVERITY_INFO:
2070           type_status->SetString("status", "disabled");
2071           type_status->SetString("value", error.message());
2072           break;
2073         default:
2074           NOTREACHED() << "Unexpected error severity.";
2075           break;
2076       }
2077     } else if (syncer::IsProxyType(type) && passive_types.Has(type)) {
2078       // Show a proxy type in "ok" state unless it is disabled by user.
2079       DCHECK(!throttled_types.Has(type));
2080       type_status->SetString("status", "ok");
2081       type_status->SetString("value", "Passive");
2082     } else if (throttled_types.Has(type) && passive_types.Has(type)) {
2083       type_status->SetString("status", "warning");
2084       type_status->SetString("value", "Passive, Throttled");
2085     } else if (passive_types.Has(type)) {
2086       type_status->SetString("status", "warning");
2087       type_status->SetString("value", "Passive");
2088     } else if (throttled_types.Has(type)) {
2089       type_status->SetString("status", "warning");
2090       type_status->SetString("value", "Throttled");
2091     } else if (GetRegisteredNonBlockingDataTypes().Has(type)) {
2092       type_status->SetString("status", "ok");
2093       type_status->SetString("value", "Non-Blocking");
2094     } else if (active_types.Has(type)) {
2095       type_status->SetString("status", "ok");
2096       type_status->SetString("value", "Active: " +
2097                              ModelSafeGroupToString(routing_info[type]));
2098     } else {
2099       type_status->SetString("status", "warning");
2100       type_status->SetString("value", "Disabled by User");
2101     }
2102
2103     int live_count = detailed_status.num_entries_by_type[type] -
2104         detailed_status.num_to_delete_entries_by_type[type];
2105     type_status->SetInteger("num_entries",
2106                             detailed_status.num_entries_by_type[type]);
2107     type_status->SetInteger("num_live", live_count);
2108
2109     result->Append(type_status.release());
2110   }
2111   return result.release();
2112 }
2113
2114 void ProfileSyncService::DeactivateDataType(syncer::ModelType type) {
2115   if (!backend_)
2116     return;
2117   backend_->DeactivateDataType(type);
2118 }
2119
2120 void ProfileSyncService::ConsumeCachedPassphraseIfPossible() {
2121   // If no cached passphrase, or sync backend hasn't started up yet, just exit.
2122   // If the backend isn't running yet, OnBackendInitialized() will call this
2123   // method again after the backend starts up.
2124   if (cached_passphrase_.empty() || !backend_initialized())
2125     return;
2126
2127   // Backend is up and running, so we can consume the cached passphrase.
2128   std::string passphrase = cached_passphrase_;
2129   cached_passphrase_.clear();
2130
2131   // If we need a passphrase to decrypt data, try the cached passphrase.
2132   if (passphrase_required_reason() == syncer::REASON_DECRYPTION) {
2133     if (SetDecryptionPassphrase(passphrase)) {
2134       DVLOG(1) << "Cached passphrase successfully decrypted pending keys";
2135       return;
2136     }
2137   }
2138
2139   // If we get here, we don't have pending keys (or at least, the passphrase
2140   // doesn't decrypt them) - just try to re-encrypt using the encryption
2141   // passphrase.
2142   if (!IsUsingSecondaryPassphrase())
2143     SetEncryptionPassphrase(passphrase, IMPLICIT);
2144 }
2145
2146 void ProfileSyncService::RequestAccessToken() {
2147   // Only one active request at a time.
2148   if (access_token_request_ != NULL)
2149     return;
2150   request_access_token_retry_timer_.Stop();
2151   OAuth2TokenService::ScopeSet oauth2_scopes;
2152   oauth2_scopes.insert(signin_->GetSyncScopeToUse());
2153
2154   // Invalidate previous token, otherwise token service will return the same
2155   // token again.
2156   const std::string& account_id = signin_->GetAccountIdToUse();
2157   if (!access_token_.empty()) {
2158     oauth2_token_service_->InvalidateToken(
2159         account_id, oauth2_scopes, access_token_);
2160   }
2161
2162   access_token_.clear();
2163
2164   token_request_time_ = base::Time::Now();
2165   token_receive_time_ = base::Time();
2166   next_token_request_time_ = base::Time();
2167   access_token_request_ =
2168       oauth2_token_service_->StartRequest(account_id, oauth2_scopes, this);
2169 }
2170
2171 void ProfileSyncService::SetEncryptionPassphrase(const std::string& passphrase,
2172                                                  PassphraseType type) {
2173   // This should only be called when the backend has been initialized.
2174   DCHECK(backend_initialized());
2175   DCHECK(!(type == IMPLICIT && IsUsingSecondaryPassphrase())) <<
2176       "Data is already encrypted using an explicit passphrase";
2177   DCHECK(!(type == EXPLICIT &&
2178            passphrase_required_reason_ == syncer::REASON_DECRYPTION)) <<
2179          "Can not set explicit passphrase when decryption is needed.";
2180
2181   DVLOG(1) << "Setting " << (type == EXPLICIT ? "explicit" : "implicit")
2182            << " passphrase for encryption.";
2183   if (passphrase_required_reason_ == syncer::REASON_ENCRYPTION) {
2184     // REASON_ENCRYPTION implies that the cryptographer does not have pending
2185     // keys. Hence, as long as we're not trying to do an invalid passphrase
2186     // change (e.g. explicit -> explicit or explicit -> implicit), we know this
2187     // will succeed. If for some reason a new encryption key arrives via
2188     // sync later, the SBH will trigger another OnPassphraseRequired().
2189     passphrase_required_reason_ = syncer::REASON_PASSPHRASE_NOT_REQUIRED;
2190     NotifyObservers();
2191   }
2192   backend_->SetEncryptionPassphrase(passphrase, type == EXPLICIT);
2193 }
2194
2195 bool ProfileSyncService::SetDecryptionPassphrase(
2196     const std::string& passphrase) {
2197   if (IsPassphraseRequired()) {
2198     DVLOG(1) << "Setting passphrase for decryption.";
2199     return backend_->SetDecryptionPassphrase(passphrase);
2200   } else {
2201     NOTREACHED() << "SetDecryptionPassphrase must not be called when "
2202                     "IsPassphraseRequired() is false.";
2203     return false;
2204   }
2205 }
2206
2207 bool ProfileSyncService::EncryptEverythingAllowed() const {
2208   return encrypt_everything_allowed_;
2209 }
2210
2211 void ProfileSyncService::SetEncryptEverythingAllowed(bool allowed) {
2212   DCHECK(allowed || !backend_initialized() || !EncryptEverythingEnabled());
2213   encrypt_everything_allowed_ = allowed;
2214 }
2215
2216 void ProfileSyncService::EnableEncryptEverything() {
2217   DCHECK(EncryptEverythingAllowed());
2218
2219   // Tests override backend_initialized() to always return true, so we
2220   // must check that instead of |backend_initialized_|.
2221   // TODO(akalin): Fix the above. :/
2222   DCHECK(backend_initialized());
2223   // TODO(atwilson): Persist the encryption_pending_ flag to address the various
2224   // problems around cancelling encryption in the background (crbug.com/119649).
2225   if (!encrypt_everything_)
2226     encryption_pending_ = true;
2227 }
2228
2229 bool ProfileSyncService::encryption_pending() const {
2230   // We may be called during the setup process before we're
2231   // initialized (via IsEncryptedDatatypeEnabled and
2232   // IsPassphraseRequiredForDecryption).
2233   return encryption_pending_;
2234 }
2235
2236 bool ProfileSyncService::EncryptEverythingEnabled() const {
2237   DCHECK(backend_initialized_);
2238   return encrypt_everything_ || encryption_pending_;
2239 }
2240
2241 syncer::ModelTypeSet ProfileSyncService::GetEncryptedDataTypes() const {
2242   DCHECK(encrypted_types_.Has(syncer::PASSWORDS));
2243   // We may be called during the setup process before we're
2244   // initialized.  In this case, we default to the sensitive types.
2245   return encrypted_types_;
2246 }
2247
2248 void ProfileSyncService::OnSyncManagedPrefChange(bool is_sync_managed) {
2249   if (is_sync_managed) {
2250     DisableForUser();
2251   } else {
2252     // Sync is no longer disabled by policy. Try starting it up if appropriate.
2253     startup_controller_->TryStart();
2254   }
2255 }
2256
2257 void ProfileSyncService::GoogleSigninSucceeded(const std::string& account_id,
2258                                                const std::string& username,
2259                                                const std::string& password) {
2260   if (!sync_prefs_.IsStartSuppressed() && !password.empty()) {
2261     cached_passphrase_ = password;
2262     // Try to consume the passphrase we just cached. If the sync backend
2263     // is not running yet, the passphrase will remain cached until the
2264     // backend starts up.
2265     ConsumeCachedPassphraseIfPossible();
2266   }
2267 #if defined(OS_CHROMEOS)
2268   RefreshSpareBootstrapToken(password);
2269 #endif
2270   if (!backend_initialized() || GetAuthError().state() != AuthError::NONE) {
2271     // Track the fact that we're still waiting for auth to complete.
2272     is_auth_in_progress_ = true;
2273   }
2274 }
2275
2276 void ProfileSyncService::GoogleSignedOut(const std::string& account_id,
2277                                          const std::string& username) {
2278   sync_disabled_by_admin_ = false;
2279   DisableForUser();
2280
2281   if (browser_sync::BackupRollbackController::IsBackupEnabled()) {
2282     need_backup_ = true;
2283     backup_finished_ = false;
2284   }
2285 }
2286
2287 void ProfileSyncService::AddObserver(
2288     ProfileSyncServiceBase::Observer* observer) {
2289   observers_.AddObserver(observer);
2290 }
2291
2292 void ProfileSyncService::RemoveObserver(
2293     ProfileSyncServiceBase::Observer* observer) {
2294   observers_.RemoveObserver(observer);
2295 }
2296
2297 void ProfileSyncService::AddProtocolEventObserver(
2298     browser_sync::ProtocolEventObserver* observer) {
2299   protocol_event_observers_.AddObserver(observer);
2300   if (HasSyncingBackend()) {
2301     backend_->RequestBufferedProtocolEventsAndEnableForwarding();
2302   }
2303 }
2304
2305 void ProfileSyncService::RemoveProtocolEventObserver(
2306     browser_sync::ProtocolEventObserver* observer) {
2307   protocol_event_observers_.RemoveObserver(observer);
2308   if (HasSyncingBackend() &&
2309       !protocol_event_observers_.might_have_observers()) {
2310     backend_->DisableProtocolEventForwarding();
2311   }
2312 }
2313
2314 void ProfileSyncService::AddTypeDebugInfoObserver(
2315     syncer::TypeDebugInfoObserver* type_debug_info_observer) {
2316   type_debug_info_observers_.AddObserver(type_debug_info_observer);
2317   if (type_debug_info_observers_.might_have_observers() &&
2318       backend_initialized_) {
2319     backend_->EnableDirectoryTypeDebugInfoForwarding();
2320   }
2321 }
2322
2323 void ProfileSyncService::RemoveTypeDebugInfoObserver(
2324     syncer::TypeDebugInfoObserver* type_debug_info_observer) {
2325   type_debug_info_observers_.RemoveObserver(type_debug_info_observer);
2326   if (!type_debug_info_observers_.might_have_observers() &&
2327       backend_initialized_) {
2328     backend_->DisableDirectoryTypeDebugInfoForwarding();
2329   }
2330 }
2331
2332 void ProfileSyncService::AddPreferenceProvider(
2333     SyncTypePreferenceProvider* provider) {
2334   DCHECK(!HasPreferenceProvider(provider))
2335       << "Providers may only be added once!";
2336   preference_providers_.insert(provider);
2337 }
2338
2339 void ProfileSyncService::RemovePreferenceProvider(
2340     SyncTypePreferenceProvider* provider) {
2341   DCHECK(HasPreferenceProvider(provider))
2342       << "Only providers that have been added before can be removed!";
2343   preference_providers_.erase(provider);
2344 }
2345
2346 bool ProfileSyncService::HasPreferenceProvider(
2347     SyncTypePreferenceProvider* provider) const {
2348   return preference_providers_.count(provider) > 0;
2349 }
2350
2351 namespace {
2352
2353 class GetAllNodesRequestHelper
2354     : public base::RefCountedThreadSafe<GetAllNodesRequestHelper> {
2355  public:
2356   GetAllNodesRequestHelper(
2357       syncer::ModelTypeSet requested_types,
2358       const base::Callback<void(scoped_ptr<base::ListValue>)>& callback);
2359
2360   void OnReceivedNodesForTypes(
2361       const std::vector<syncer::ModelType>& types,
2362       ScopedVector<base::ListValue> scoped_node_lists);
2363
2364  private:
2365   friend class base::RefCountedThreadSafe<GetAllNodesRequestHelper>;
2366   virtual ~GetAllNodesRequestHelper();
2367
2368   scoped_ptr<base::ListValue> result_accumulator_;
2369
2370   syncer::ModelTypeSet awaiting_types_;
2371   base::Callback<void(scoped_ptr<base::ListValue>)> callback_;
2372 };
2373
2374 GetAllNodesRequestHelper::GetAllNodesRequestHelper(
2375     syncer::ModelTypeSet requested_types,
2376     const base::Callback<void(scoped_ptr<base::ListValue>)>& callback)
2377     : result_accumulator_(new base::ListValue()),
2378       awaiting_types_(requested_types),
2379       callback_(callback) {}
2380
2381 GetAllNodesRequestHelper::~GetAllNodesRequestHelper() {
2382   if (!awaiting_types_.Empty()) {
2383     DLOG(WARNING)
2384         << "GetAllNodesRequest deleted before request was fulfilled.  "
2385         << "Missing types are: " << ModelTypeSetToString(awaiting_types_);
2386   }
2387 }
2388
2389 // Called when the set of nodes for a type or set of types has been returned.
2390 //
2391 // The nodes for several types can be returned at the same time by specifying
2392 // their types in the |types| array, and putting their results at the
2393 // correspnding indices in the |scoped_node_lists|.
2394 void GetAllNodesRequestHelper::OnReceivedNodesForTypes(
2395     const std::vector<syncer::ModelType>& types,
2396     ScopedVector<base::ListValue> scoped_node_lists) {
2397   DCHECK_EQ(types.size(), scoped_node_lists.size());
2398
2399   // Take unsafe ownership of the node list.
2400   std::vector<base::ListValue*> node_lists;
2401   scoped_node_lists.release(&node_lists);
2402
2403   for (size_t i = 0; i < node_lists.size() && i < types.size(); ++i) {
2404     const ModelType type = types[i];
2405     base::ListValue* node_list = node_lists[i];
2406
2407     // Add these results to our list.
2408     scoped_ptr<base::DictionaryValue> type_dict(new base::DictionaryValue());
2409     type_dict->SetString("type", ModelTypeToString(type));
2410     type_dict->Set("nodes", node_list);
2411     result_accumulator_->Append(type_dict.release());
2412
2413     // Remember that this part of the request is satisfied.
2414     awaiting_types_.Remove(type);
2415   }
2416
2417   if (awaiting_types_.Empty()) {
2418     callback_.Run(result_accumulator_.Pass());
2419     callback_.Reset();
2420   }
2421 }
2422
2423 }  // namespace
2424
2425 void ProfileSyncService::GetAllNodes(
2426     const base::Callback<void(scoped_ptr<base::ListValue>)>& callback) {
2427   ModelTypeSet directory_types = GetRegisteredDirectoryDataTypes();
2428   directory_types.PutAll(syncer::ControlTypes());
2429   scoped_refptr<GetAllNodesRequestHelper> helper =
2430       new GetAllNodesRequestHelper(directory_types, callback);
2431
2432   if (!backend_initialized_) {
2433     // If there's no backend available to fulfill the request, handle it here.
2434     ScopedVector<base::ListValue> empty_results;
2435     std::vector<ModelType> type_vector;
2436     for (ModelTypeSet::Iterator it = directory_types.First();
2437          it.Good(); it.Inc()) {
2438       type_vector.push_back(it.Get());
2439       empty_results.push_back(new base::ListValue());
2440     }
2441     helper->OnReceivedNodesForTypes(type_vector, empty_results.Pass());
2442   } else {
2443     backend_->GetAllNodesForTypes(
2444         directory_types,
2445         base::Bind(&GetAllNodesRequestHelper::OnReceivedNodesForTypes, helper));
2446   }
2447 }
2448
2449 bool ProfileSyncService::HasObserver(
2450     const ProfileSyncServiceBase::Observer* observer) const {
2451   return observers_.HasObserver(observer);
2452 }
2453
2454 base::WeakPtr<syncer::JsController> ProfileSyncService::GetJsController() {
2455   return sync_js_controller_.AsWeakPtr();
2456 }
2457
2458 void ProfileSyncService::SyncEvent(SyncEventCodes code) {
2459   UMA_HISTOGRAM_ENUMERATION("Sync.EventCodes", code, MAX_SYNC_EVENT_CODE);
2460 }
2461
2462 // static
2463 bool ProfileSyncService::IsSyncEnabled() {
2464   // We have switches::kEnableSync just in case we need to change back to
2465   // sync-disabled-by-default on a platform.
2466   return !base::CommandLine::ForCurrentProcess()->HasSwitch(
2467       switches::kDisableSync);
2468 }
2469
2470 bool ProfileSyncService::IsManaged() const {
2471   return sync_prefs_.IsManaged() || sync_disabled_by_admin_;
2472 }
2473
2474 void ProfileSyncService::StopAndSuppress() {
2475   sync_prefs_.SetStartSuppressed(true);
2476   if (HasSyncingBackend()) {
2477     backend_->UnregisterInvalidationIds();
2478   }
2479   ShutdownImpl(syncer::STOP_SYNC);
2480 }
2481
2482 bool ProfileSyncService::IsStartSuppressed() const {
2483   return sync_prefs_.IsStartSuppressed();
2484 }
2485
2486 SigninManagerBase* ProfileSyncService::signin() const {
2487   if (!signin_)
2488     return NULL;
2489   return signin_->GetOriginal();
2490 }
2491
2492 void ProfileSyncService::UnsuppressAndStart() {
2493   DCHECK(profile_);
2494   sync_prefs_.SetStartSuppressed(false);
2495   DCHECK(!signin_.get() || signin_->GetOriginal()->IsAuthenticated());
2496   startup_controller_->TryStart();
2497 }
2498
2499 void ProfileSyncService::ReconfigureDatatypeManager() {
2500   // If we haven't initialized yet, don't configure the DTM as it could cause
2501   // association to start before a Directory has even been created.
2502   if (backend_initialized_) {
2503     DCHECK(backend_.get());
2504     ConfigureDataTypeManager();
2505   } else if (HasUnrecoverableError()) {
2506     // There is nothing more to configure. So inform the listeners,
2507     NotifyObservers();
2508
2509     DVLOG(1) << "ConfigureDataTypeManager not invoked because of an "
2510              << "Unrecoverable error.";
2511   } else {
2512     DVLOG(0) << "ConfigureDataTypeManager not invoked because backend is not "
2513              << "initialized";
2514   }
2515 }
2516
2517 syncer::ModelTypeSet ProfileSyncService::GetDataTypesFromPreferenceProviders()
2518     const {
2519   syncer::ModelTypeSet types;
2520   for (std::set<SyncTypePreferenceProvider*>::const_iterator it =
2521            preference_providers_.begin();
2522        it != preference_providers_.end();
2523        ++it) {
2524     types.PutAll((*it)->GetPreferredDataTypes());
2525   }
2526   return types;
2527 }
2528
2529 const DataTypeStatusTable& ProfileSyncService::data_type_status_table()
2530     const {
2531   return data_type_status_table_;
2532 }
2533
2534 void ProfileSyncService::OnInternalUnrecoverableError(
2535     const tracked_objects::Location& from_here,
2536     const std::string& message,
2537     bool delete_sync_database,
2538     UnrecoverableErrorReason reason) {
2539   DCHECK(!HasUnrecoverableError());
2540   unrecoverable_error_reason_ = reason;
2541   OnUnrecoverableErrorImpl(from_here, message, delete_sync_database);
2542 }
2543
2544 syncer::SyncManagerFactory::MANAGER_TYPE
2545 ProfileSyncService::GetManagerType() const {
2546   switch (backend_mode_) {
2547     case SYNC:
2548       return syncer::SyncManagerFactory::NORMAL;
2549     case BACKUP:
2550       return syncer::SyncManagerFactory::BACKUP;
2551     case ROLLBACK:
2552       return syncer::SyncManagerFactory::ROLLBACK;
2553     case IDLE:
2554       NOTREACHED();
2555   }
2556   return syncer::SyncManagerFactory::NORMAL;
2557 }
2558
2559 bool ProfileSyncService::IsRetryingAccessTokenFetchForTest() const {
2560   return request_access_token_retry_timer_.IsRunning();
2561 }
2562
2563 std::string ProfileSyncService::GetAccessTokenForTest() const {
2564   return access_token_;
2565 }
2566
2567 WeakHandle<syncer::JsEventHandler> ProfileSyncService::GetJsEventHandler() {
2568   return MakeWeakHandle(sync_js_controller_.AsWeakPtr());
2569 }
2570
2571 syncer::SyncableService* ProfileSyncService::GetSessionsSyncableService() {
2572   return sessions_sync_manager_.get();
2573 }
2574
2575 syncer::SyncableService* ProfileSyncService::GetDeviceInfoSyncableService() {
2576   return device_info_sync_service_.get();
2577 }
2578
2579 ProfileSyncService::SyncTokenStatus::SyncTokenStatus()
2580     : connection_status(syncer::CONNECTION_NOT_ATTEMPTED),
2581       last_get_token_error(GoogleServiceAuthError::AuthErrorNone()) {}
2582 ProfileSyncService::SyncTokenStatus::~SyncTokenStatus() {}
2583
2584 ProfileSyncService::SyncTokenStatus
2585 ProfileSyncService::GetSyncTokenStatus() const {
2586   SyncTokenStatus status;
2587   status.connection_status_update_time = connection_status_update_time_;
2588   status.connection_status = connection_status_;
2589   status.token_request_time = token_request_time_;
2590   status.token_receive_time = token_receive_time_;
2591   status.last_get_token_error = last_get_token_error_;
2592   if (request_access_token_retry_timer_.IsRunning())
2593     status.next_token_request_time = next_token_request_time_;
2594   return status;
2595 }
2596
2597 void ProfileSyncService::OverrideNetworkResourcesForTest(
2598     scoped_ptr<syncer::NetworkResources> network_resources) {
2599   network_resources_ = network_resources.Pass();
2600 }
2601
2602 bool ProfileSyncService::HasSyncingBackend() const {
2603   return backend_mode_ != SYNC ? false : backend_ != NULL;
2604 }
2605
2606 void ProfileSyncService::UpdateFirstSyncTimePref() {
2607   if (signin_->GetEffectiveUsername().empty()) {
2608     // Clear if user's not signed in and rollback is done.
2609     if (backend_mode_ != ROLLBACK)
2610       sync_prefs_.ClearFirstSyncTime();
2611   } else if (sync_prefs_.GetFirstSyncTime().is_null() &&
2612       backend_mode_ == SYNC) {
2613     // Set if not set before and it's syncing now.
2614     sync_prefs_.SetFirstSyncTime(base::Time::Now());
2615   }
2616 }
2617
2618 void ProfileSyncService::ClearBrowsingDataSinceFirstSync() {
2619   base::Time first_sync_time = sync_prefs_.GetFirstSyncTime();
2620   if (first_sync_time.is_null())
2621     return;
2622
2623   clear_browsing_data_.Run(browsing_data_remover_observer_,
2624                            profile_,
2625                            first_sync_time,
2626                            base::Time::Now());
2627 }
2628
2629 void ProfileSyncService::SetBrowsingDataRemoverObserverForTesting(
2630     BrowsingDataRemover::Observer* observer) {
2631   browsing_data_remover_observer_ = observer;
2632 }
2633
2634 void ProfileSyncService::SetClearingBrowseringDataForTesting(
2635     base::Callback<void(BrowsingDataRemover::Observer* observer,
2636                         Profile*,
2637                         base::Time,
2638                         base::Time)> c) {
2639   clear_browsing_data_ = c;
2640 }
2641
2642 GURL ProfileSyncService::GetSyncServiceURL(
2643     const base::CommandLine& command_line) {
2644   // By default, dev, canary, and unbranded Chromium users will go to the
2645   // development servers. Development servers have more features than standard
2646   // sync servers. Users with officially-branded Chrome stable and beta builds
2647   // will go to the standard sync servers.
2648   GURL result(kDevServerUrl);
2649
2650   chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
2651   if (channel == chrome::VersionInfo::CHANNEL_STABLE ||
2652       channel == chrome::VersionInfo::CHANNEL_BETA) {
2653     result = GURL(kSyncServerUrl);
2654   }
2655
2656   // Override the sync server URL from the command-line, if sync server
2657   // command-line argument exists.
2658   if (command_line.HasSwitch(switches::kSyncServiceURL)) {
2659     std::string value(command_line.GetSwitchValueASCII(
2660         switches::kSyncServiceURL));
2661     if (!value.empty()) {
2662       GURL custom_sync_url(value);
2663       if (custom_sync_url.is_valid()) {
2664         result = custom_sync_url;
2665       } else {
2666         LOG(WARNING) << "The following sync URL specified at the command-line "
2667                      << "is invalid: " << value;
2668       }
2669     }
2670   }
2671   return result;
2672 }
2673
2674 void ProfileSyncService::CheckSyncBackupIfNeeded() {
2675   DCHECK_EQ(backend_mode_, SYNC);
2676
2677 #if defined(ENABLE_PRE_SYNC_BACKUP)
2678   const base::Time last_synced_time = sync_prefs_.GetLastSyncedTime();
2679   // Check backup once a day.
2680   if (!last_backup_time_ &&
2681       (last_synced_time.is_null() ||
2682           base::Time::Now() - last_synced_time >=
2683               base::TimeDelta::FromDays(1))) {
2684     // If sync thread is set, need to serialize check on sync thread after
2685     // closing backup DB.
2686     if (sync_thread_) {
2687       sync_thread_->message_loop_proxy()->PostTask(
2688           FROM_HERE,
2689           base::Bind(syncer::CheckSyncDbLastModifiedTime,
2690                      profile_->GetPath().Append(kSyncBackupDataFolderName),
2691                      base::MessageLoopProxy::current(),
2692                      base::Bind(&ProfileSyncService::CheckSyncBackupCallback,
2693                                 weak_factory_.GetWeakPtr())));
2694     } else {
2695       content::BrowserThread::PostTask(
2696           content::BrowserThread::FILE, FROM_HERE,
2697           base::Bind(syncer::CheckSyncDbLastModifiedTime,
2698                      profile_->GetPath().Append(kSyncBackupDataFolderName),
2699                      base::MessageLoopProxy::current(),
2700                      base::Bind(&ProfileSyncService::CheckSyncBackupCallback,
2701                                 weak_factory_.GetWeakPtr())));
2702     }
2703   }
2704 #endif
2705 }
2706
2707 void ProfileSyncService::CheckSyncBackupCallback(base::Time backup_time) {
2708   last_backup_time_.reset(new base::Time(backup_time));
2709
2710   DCHECK(device_info_sync_service_);
2711   device_info_sync_service_->UpdateLocalDeviceBackupTime(*last_backup_time_);
2712 }
2713
2714 void ProfileSyncService::TryStartSyncAfterBackup() {
2715   startup_controller_->Reset(GetRegisteredDataTypes());
2716   startup_controller_->TryStart();
2717 }
2718
2719 void ProfileSyncService::CleanUpBackup() {
2720   sync_prefs_.ClearFirstSyncTime();
2721   profile_->GetIOTaskRunner()->PostTask(
2722       FROM_HERE,
2723       base::Bind(base::IgnoreResult(base::DeleteFile),
2724                  profile_->GetPath().Append(kSyncBackupDataFolderName),
2725                  true));
2726 }
2727
2728 bool ProfileSyncService::NeedBackup() const {
2729   return need_backup_;
2730 }
2731
2732 base::Time ProfileSyncService::GetDeviceBackupTimeForTesting() const {
2733   return device_info_sync_service_->GetLocalDeviceBackupTime();
2734 }
2735
2736 void ProfileSyncService::FlushDirectory() const {
2737   // backend_initialized_ implies backend_ isn't NULL and the manager exists.
2738   // If sync is not initialized yet, we fail silently.
2739   if (backend_initialized_)
2740     backend_->FlushDirectory();
2741 }
2742
2743 base::FilePath ProfileSyncService::GetDirectoryPathForTest() const {
2744   return directory_path_;
2745 }
2746
2747 base::MessageLoop* ProfileSyncService::GetSyncLoopForTest() const {
2748   if (sync_thread_) {
2749     return sync_thread_->message_loop();
2750   } else if (backend_) {
2751     return backend_->GetSyncLoopForTesting();
2752   } else {
2753     return NULL;
2754   }
2755 }
2756
2757 void ProfileSyncService::RemoveClientFromServer() const {
2758   if (!backend_initialized_) return;
2759   const std::string cache_guid = local_device_->GetLocalSyncCacheGUID();
2760   std::string birthday;
2761   syncer::UserShare* user_share = GetUserShare();
2762   if (user_share && user_share->directory.get()) {
2763     birthday = user_share->directory->store_birthday();
2764   }
2765   if (!access_token_.empty() && !cache_guid.empty() && !birthday.empty()) {
2766     sync_stopped_reporter_->ReportSyncStopped(
2767         access_token_, cache_guid, birthday);
2768   }
2769 }