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(sync_driver::SyncServiceObserver, observers_,
 938                     OnStateChanged());
 939 }
 940
 941 void ProfileSyncService::NotifySyncCycleCompleted() {
 942   FOR_EACH_OBSERVER(sync_driver::SyncServiceObserver, 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 // An invariant has been violated.  Transition to an error state where we try
 962 // to do as little work as possible, to avoid further corruption or crashes.
 963 void ProfileSyncService::OnUnrecoverableError(
 964     const tracked_objects::Location& from_here,
 965     const std::string& message) {
 966   // Unrecoverable errors that arrive via the syncer::UnrecoverableErrorHandler
 967   // interface are assumed to originate within the syncer.
 968   unrecoverable_error_reason_ = ERROR_REASON_SYNCER;
 969   OnUnrecoverableErrorImpl(from_here, message, true);
 970 }
 971
 972 void ProfileSyncService::OnUnrecoverableErrorImpl(
 973     const tracked_objects::Location& from_here,
 974     const std::string& message,
 975     bool delete_sync_database) {
 976   DCHECK(HasUnrecoverableError());
 977   unrecoverable_error_message_ = message;
 978   unrecoverable_error_location_ = from_here;
 979
 980   UMA_HISTOGRAM_ENUMERATION(kSyncUnrecoverableErrorHistogram,
 981                             unrecoverable_error_reason_,
 982                             ERROR_REASON_LIMIT);
 983   std::string location;
 984   from_here.Write(true, true, &location);
 985   LOG(ERROR)
 986       << "Unrecoverable error detected at " << location
 987       << " -- ProfileSyncService unusable: " << message;
 988
 989   // Shut all data types down.
 990   base::MessageLoop::current()->PostTask(FROM_HERE,
 991       base::Bind(&ProfileSyncService::ShutdownImpl,
 992                  weak_factory_.GetWeakPtr(),
 993                  delete_sync_database ?
 994                      syncer::DISABLE_SYNC : syncer::STOP_SYNC));
 995 }
 996
 997 void ProfileSyncService::ReenableDatatype(syncer::ModelType type) {
 998   if (!backend_initialized_)
 999     return;
1000   directory_data_type_manager_->ReenableType(type);
1001 }
1002
1003 void ProfileSyncService::UpdateBackendInitUMA(bool success) {
1004   if (backend_mode_ != SYNC)
1005     return;
1006
1007   is_first_time_sync_configure_ = !HasSyncSetupCompleted();
1008
1009   if (is_first_time_sync_configure_) {
1010     UMA_HISTOGRAM_BOOLEAN("Sync.BackendInitializeFirstTimeSuccess", success);
1011   } else {
1012     UMA_HISTOGRAM_BOOLEAN("Sync.BackendInitializeRestoreSuccess", success);
1013   }
1014
1015   base::Time on_backend_initialized_time = base::Time::Now();
1016   base::TimeDelta delta = on_backend_initialized_time -
1017       startup_controller_->start_backend_time();
1018   if (is_first_time_sync_configure_) {
1019     UMA_HISTOGRAM_LONG_TIMES("Sync.BackendInitializeFirstTime", delta);
1020   } else {
1021     UMA_HISTOGRAM_LONG_TIMES("Sync.BackendInitializeRestoreTime", delta);
1022   }
1023 }
1024
1025 void ProfileSyncService::PostBackendInitialization() {
1026   // Never get here for backup / restore.
1027   DCHECK_EQ(backend_mode_, SYNC);
1028
1029   if (last_backup_time_) {
1030     DCHECK(device_info_sync_service_);
1031     device_info_sync_service_->UpdateLocalDeviceBackupTime(*last_backup_time_);
1032   }
1033
1034   if (protocol_event_observers_.might_have_observers()) {
1035     backend_->RequestBufferedProtocolEventsAndEnableForwarding();
1036   }
1037
1038   non_blocking_data_type_manager_.ConnectSyncBackend(
1039       backend_->GetSyncContextProxy());
1040
1041   if (type_debug_info_observers_.might_have_observers()) {
1042     backend_->EnableDirectoryTypeDebugInfoForwarding();
1043   }
1044
1045   // If we have a cached passphrase use it to decrypt/encrypt data now that the
1046   // backend is initialized. We want to call this before notifying observers in
1047   // case this operation affects the "passphrase required" status.
1048   ConsumeCachedPassphraseIfPossible();
1049
1050   // The very first time the backend initializes is effectively the first time
1051   // we can say we successfully "synced".  LastSyncedTime will only be null in
1052   // this case, because the pref wasn't restored on StartUp.
1053   if (sync_prefs_.GetLastSyncedTime().is_null()) {
1054     UpdateLastSyncedTime();
1055   }
1056
1057   if (startup_controller_->auto_start_enabled() && !FirstSetupInProgress()) {
1058     // Backend is initialized but we're not in sync setup, so this must be an
1059     // autostart - mark our sync setup as completed and we'll start syncing
1060     // below.
1061     SetSyncSetupCompleted();
1062   }
1063
1064   // Check HasSyncSetupCompleted() before NotifyObservers() to avoid spurious
1065   // data type configuration because observer may flag setup as complete and
1066   // trigger data type configuration.
1067   if (HasSyncSetupCompleted()) {
1068     ConfigureDataTypeManager();
1069   } else {
1070     DCHECK(FirstSetupInProgress());
1071   }
1072
1073   NotifyObservers();
1074 }
1075
1076 void ProfileSyncService::OnBackendInitialized(
1077     const syncer::WeakHandle<syncer::JsBackend>& js_backend,
1078     const syncer::WeakHandle<syncer::DataTypeDebugInfoListener>&
1079         debug_info_listener,
1080     const std::string& cache_guid,
1081     bool success) {
1082   UpdateBackendInitUMA(success);
1083
1084   if (!success) {
1085     // Something went unexpectedly wrong.  Play it safe: stop syncing at once
1086     // and surface error UI to alert the user sync has stopped.
1087     // Keep the directory around for now so that on restart we will retry
1088     // again and potentially succeed in presence of transient file IO failures
1089     // or permissions issues, etc.
1090     //
1091     // TODO(rlarocque): Consider making this UnrecoverableError less special.
1092     // Unlike every other UnrecoverableError, it does not delete our sync data.
1093     // This exception made sense at the time it was implemented, but our new
1094     // directory corruption recovery mechanism makes it obsolete.  By the time
1095     // we get here, we will have already tried and failed to delete the
1096     // directory.  It would be no big deal if we tried to delete it again.
1097     OnInternalUnrecoverableError(FROM_HERE,
1098                                  "BackendInitialize failure",
1099                                  false,
1100                                  ERROR_REASON_BACKEND_INIT_FAILURE);
1101     return;
1102   }
1103
1104   backend_initialized_ = true;
1105
1106   sync_js_controller_.AttachJsBackend(js_backend);
1107   debug_info_listener_ = debug_info_listener;
1108
1109   SigninClient* signin_client =
1110       ChromeSigninClientFactory::GetForProfile(profile_);
1111   DCHECK(signin_client);
1112   std::string signin_scoped_device_id =
1113       signin_client->GetSigninScopedDeviceId();
1114
1115   // Initialize local device info.
1116   local_device_->Initialize(cache_guid, signin_scoped_device_id);
1117
1118   DVLOG(1) << "Setting preferred types for non-blocking DTM";
1119   non_blocking_data_type_manager_.SetPreferredTypes(GetPreferredDataTypes());
1120
1121   // Give the DataTypeControllers a handle to the now initialized backend
1122   // as a UserShare.
1123   for (DataTypeController::TypeMap::iterator it =
1124        directory_data_type_controllers_.begin();
1125        it != directory_data_type_controllers_.end(); ++it) {
1126     it->second->OnUserShareReady(GetUserShare());
1127   }
1128
1129   if (backend_mode_ == BACKUP || backend_mode_ == ROLLBACK)
1130     ConfigureDataTypeManager();
1131   else
1132     PostBackendInitialization();
1133 }
1134
1135 void ProfileSyncService::OnSyncCycleCompleted() {
1136   UpdateLastSyncedTime();
1137   if (IsDataTypeControllerRunning(syncer::SESSIONS)) {
1138     // Trigger garbage collection of old sessions now that we've downloaded
1139     // any new session data.
1140     base::MessageLoop::current()->PostTask(FROM_HERE, base::Bind(
1141         &SessionsSyncManager::DoGarbageCollection,
1142             base::AsWeakPtr(sessions_sync_manager_.get())));
1143   }
1144   DVLOG(2) << "Notifying observers sync cycle completed";
1145   NotifySyncCycleCompleted();
1146 }
1147
1148 void ProfileSyncService::OnExperimentsChanged(
1149     const syncer::Experiments& experiments) {
1150   if (current_experiments_.Matches(experiments))
1151     return;
1152
1153   current_experiments_ = experiments;
1154
1155   profile()->GetPrefs()->SetBoolean(prefs::kInvalidationServiceUseGCMChannel,
1156                                     experiments.gcm_invalidations_enabled);
1157   profile()->GetPrefs()->SetBoolean(
1158       autofill::prefs::kAutofillWalletSyncExperimentEnabled,
1159       experiments.wallet_sync_enabled);
1160 }
1161
1162 void ProfileSyncService::UpdateAuthErrorState(const AuthError& error) {
1163   is_auth_in_progress_ = false;
1164   last_auth_error_ = error;
1165
1166   NotifyObservers();
1167 }
1168
1169 namespace {
1170
1171 AuthError ConnectionStatusToAuthError(
1172     syncer::ConnectionStatus status) {
1173   switch (status) {
1174     case syncer::CONNECTION_OK:
1175       return AuthError::AuthErrorNone();
1176       break;
1177     case syncer::CONNECTION_AUTH_ERROR:
1178       return AuthError(AuthError::INVALID_GAIA_CREDENTIALS);
1179       break;
1180     case syncer::CONNECTION_SERVER_ERROR:
1181       return AuthError(AuthError::CONNECTION_FAILED);
1182       break;
1183     default:
1184       NOTREACHED();
1185       return AuthError(AuthError::CONNECTION_FAILED);
1186   }
1187 }
1188
1189 }  // namespace
1190
1191 void ProfileSyncService::OnConnectionStatusChange(
1192     syncer::ConnectionStatus status) {
1193   connection_status_update_time_ = base::Time::Now();
1194   connection_status_ = status;
1195   if (status == syncer::CONNECTION_AUTH_ERROR) {
1196     // Sync server returned error indicating that access token is invalid. It
1197     // could be either expired or access is revoked. Let's request another
1198     // access token and if access is revoked then request for token will fail
1199     // with corresponding error. If access token is repeatedly reported
1200     // invalid, there may be some issues with server, e.g. authentication
1201     // state is inconsistent on sync and token server. In that case, we
1202     // backoff token requests exponentially to avoid hammering token server
1203     // too much and to avoid getting same token due to token server's caching
1204     // policy. |request_access_token_retry_timer_| is used to backoff request
1205     // triggered by both auth error and failure talking to GAIA server.
1206     // Therefore, we're likely to reach the backoff ceiling more quickly than
1207     // you would expect from looking at the BackoffPolicy if both types of
1208     // errors happen. We shouldn't receive two errors back-to-back without
1209     // attempting a token/sync request in between, thus crank up request delay
1210     // unnecessary. This is because we won't make a sync request if we hit an
1211     // error until GAIA succeeds at sending a new token, and we won't request
1212     // a new token unless sync reports a token failure. But to be safe, don't
1213     // schedule request if this happens.
1214     if (request_access_token_retry_timer_.IsRunning()) {
1215       // The timer to perform a request later is already running; nothing
1216       // further needs to be done at this point.
1217     } else if (request_access_token_backoff_.failure_count() == 0) {
1218       // First time request without delay. Currently invalid token is used
1219       // to initialize sync backend and we'll always end up here. We don't
1220       // want to delay initialization.
1221       request_access_token_backoff_.InformOfRequest(false);
1222       RequestAccessToken();
1223     } else  {
1224       request_access_token_backoff_.InformOfRequest(false);
1225       request_access_token_retry_timer_.Start(
1226           FROM_HERE,
1227           request_access_token_backoff_.GetTimeUntilRelease(),
1228           base::Bind(&ProfileSyncService::RequestAccessToken,
1229                      weak_factory_.GetWeakPtr()));
1230     }
1231   } else {
1232     // Reset backoff time after successful connection.
1233     if (status == syncer::CONNECTION_OK) {
1234       // Request shouldn't be scheduled at this time. But if it is, it's
1235       // possible that sync flips between OK and auth error states rapidly,
1236       // thus hammers token server. To be safe, only reset backoff delay when
1237       // no scheduled request.
1238       if (request_access_token_retry_timer_.IsRunning()) {
1239         NOTREACHED();
1240       } else {
1241         request_access_token_backoff_.Reset();
1242       }
1243     }
1244
1245     const GoogleServiceAuthError auth_error =
1246         ConnectionStatusToAuthError(status);
1247     DVLOG(1) << "Connection status change: " << auth_error.ToString();
1248     UpdateAuthErrorState(auth_error);
1249   }
1250 }
1251
1252 void ProfileSyncService::StopSyncingPermanently() {
1253   sync_prefs_.SetStartSuppressed(true);
1254   DisableForUser();
1255 }
1256
1257 void ProfileSyncService::OnPassphraseRequired(
1258     syncer::PassphraseRequiredReason reason,
1259     const sync_pb::EncryptedData& pending_keys) {
1260   DCHECK(backend_.get());
1261   DCHECK(backend_->IsNigoriEnabled());
1262
1263   // TODO(lipalani) : add this check to other locations as well.
1264   if (HasUnrecoverableError()) {
1265     // When unrecoverable error is detected we post a task to shutdown the
1266     // backend. The task might not have executed yet.
1267     return;
1268   }
1269
1270   DVLOG(1) << "Passphrase required with reason: "
1271            << syncer::PassphraseRequiredReasonToString(reason);
1272   passphrase_required_reason_ = reason;
1273
1274   const syncer::ModelTypeSet types = GetPreferredDirectoryDataTypes();
1275   if (directory_data_type_manager_) {
1276     // Reconfigure without the encrypted types (excluded implicitly via the
1277     // failed datatypes handler).
1278     directory_data_type_manager_->Configure(types,
1279                                             syncer::CONFIGURE_REASON_CRYPTO);
1280   }
1281
1282   // TODO(rlarocque): Support non-blocking types.  http://crbug.com/351005.
1283
1284   // Notify observers that the passphrase status may have changed.
1285   NotifyObservers();
1286 }
1287
1288 void ProfileSyncService::OnPassphraseAccepted() {
1289   DVLOG(1) << "Received OnPassphraseAccepted.";
1290
1291   // If the pending keys were resolved via keystore, it's possible we never
1292   // consumed our cached passphrase. Clear it now.
1293   if (!cached_passphrase_.empty())
1294     cached_passphrase_.clear();
1295
1296   // Reset passphrase_required_reason_ since we know we no longer require the
1297   // passphrase. We do this here rather than down in ResolvePassphraseRequired()
1298   // because that can be called by OnPassphraseRequired() if no encrypted data
1299   // types are enabled, and we don't want to clobber the true passphrase error.
1300   passphrase_required_reason_ = syncer::REASON_PASSPHRASE_NOT_REQUIRED;
1301
1302   // Make sure the data types that depend on the passphrase are started at
1303   // this time.
1304   const syncer::ModelTypeSet types = GetPreferredDirectoryDataTypes();
1305   if (directory_data_type_manager_) {
1306     // Re-enable any encrypted types if necessary.
1307     directory_data_type_manager_->Configure(types,
1308                                             syncer::CONFIGURE_REASON_CRYPTO);
1309   }
1310
1311   // TODO(rlarocque): Support non-blocking types.  http://crbug.com/351005.
1312
1313   NotifyObservers();
1314 }
1315
1316 void ProfileSyncService::OnEncryptedTypesChanged(
1317     syncer::ModelTypeSet encrypted_types,
1318     bool encrypt_everything) {
1319   encrypted_types_ = encrypted_types;
1320   encrypt_everything_ = encrypt_everything;
1321   DCHECK(encrypt_everything_allowed_ || !encrypt_everything_);
1322   DVLOG(1) << "Encrypted types changed to "
1323            << syncer::ModelTypeSetToString(encrypted_types_)
1324            << " (encrypt everything is set to "
1325            << (encrypt_everything_ ? "true" : "false") << ")";
1326   DCHECK(encrypted_types_.Has(syncer::PASSWORDS));
1327
1328   NotifyObservers();
1329 }
1330
1331 void ProfileSyncService::OnEncryptionComplete() {
1332   DVLOG(1) << "Encryption complete";
1333   if (encryption_pending_ && encrypt_everything_) {
1334     encryption_pending_ = false;
1335     // This is to nudge the integration tests when encryption is
1336     // finished.
1337     NotifyObservers();
1338   }
1339 }
1340
1341 void ProfileSyncService::OnMigrationNeededForTypes(
1342     syncer::ModelTypeSet types) {
1343   DCHECK(backend_initialized_);
1344   DCHECK(directory_data_type_manager_.get());
1345
1346   // Migrator must be valid, because we don't sync until it is created and this
1347   // callback originates from a sync cycle.
1348   migrator_->MigrateTypes(types);
1349 }
1350
1351 void ProfileSyncService::OnActionableError(const SyncProtocolError& error) {
1352   last_actionable_error_ = error;
1353   DCHECK_NE(last_actionable_error_.action,
1354             syncer::UNKNOWN_ACTION);
1355   switch (error.action) {
1356     case syncer::UPGRADE_CLIENT:
1357     case syncer::CLEAR_USER_DATA_AND_RESYNC:
1358     case syncer::ENABLE_SYNC_ON_ACCOUNT:
1359     case syncer::STOP_AND_RESTART_SYNC:
1360       // TODO(lipalani) : if setup in progress we want to display these
1361       // actions in the popup. The current experience might not be optimal for
1362       // the user. We just dismiss the dialog.
1363       if (startup_controller_->setup_in_progress()) {
1364         StopSyncingPermanently();
1365         expect_sync_configuration_aborted_ = true;
1366       }
1367       // Trigger an unrecoverable error to stop syncing.
1368       OnInternalUnrecoverableError(FROM_HERE,
1369                                    last_actionable_error_.error_description,
1370                                    true,
1371                                    ERROR_REASON_ACTIONABLE_ERROR);
1372       break;
1373     case syncer::DISABLE_SYNC_AND_ROLLBACK:
1374       backup_rollback_controller_->OnRollbackReceived();
1375       // Fall through to shutdown backend and sign user out.
1376     case syncer::DISABLE_SYNC_ON_CLIENT:
1377       StopSyncingPermanently();
1378 #if !defined(OS_CHROMEOS)
1379       // On desktop Chrome, sign out the user after a dashboard clear.
1380       // Skip sign out on ChromeOS/Android.
1381       if (!startup_controller_->auto_start_enabled()) {
1382         SigninManagerFactory::GetForProfile(profile_)->SignOut(
1383             signin_metrics::SERVER_FORCED_DISABLE);
1384       }
1385 #endif
1386       break;
1387     case syncer::ROLLBACK_DONE:
1388       backup_rollback_controller_->OnRollbackDone();
1389       break;
1390     case syncer::STOP_SYNC_FOR_DISABLED_ACCOUNT:
1391       // Sync disabled by domain admin. we should stop syncing until next
1392       // restart.
1393       sync_disabled_by_admin_ = true;
1394       ShutdownImpl(syncer::DISABLE_SYNC);
1395       break;
1396     default:
1397       NOTREACHED();
1398   }
1399   NotifyObservers();
1400
1401   if (error.action == syncer::DISABLE_SYNC_ON_CLIENT ||
1402       (error.action == syncer::DISABLE_SYNC_AND_ROLLBACK &&
1403           !backup_rollback_controller_->StartRollback())) {
1404     // Clean up backup data for sign-out only or when rollback is disabled.
1405     CleanUpBackup();
1406   } else if (error.action == syncer::ROLLBACK_DONE) {
1407     // Shut down ROLLBACK backend and delete backup DB.
1408     ShutdownImpl(syncer::DISABLE_SYNC);
1409     sync_prefs_.ClearFirstSyncTime();
1410   }
1411 }
1412
1413 void ProfileSyncService::OnConfigureDone(
1414     const DataTypeManager::ConfigureResult& result) {
1415   configure_status_ = result.status;
1416   data_type_status_table_ = result.data_type_status_table;
1417
1418   if (backend_mode_ != SYNC) {
1419     if (configure_status_ == DataTypeManager::OK) {
1420       StartSyncingWithServer();
1421
1422       // Backup is done after models are associated.
1423       if (backend_mode_ == BACKUP)
1424         backup_finished_ = true;
1425
1426       // Asynchronously check whether sync needs to start.
1427       base::MessageLoop::current()->PostTask(
1428           FROM_HERE, base::Bind(&ProfileSyncService::TryStartSyncAfterBackup,
1429                                 startup_controller_weak_factory_.GetWeakPtr()));
1430     } else if (!expect_sync_configuration_aborted_) {
1431       DVLOG(1) << "Backup/rollback backend failed to configure.";
1432       ShutdownImpl(syncer::STOP_SYNC);
1433     }
1434
1435     return;
1436   }
1437
1438   // We should have cleared our cached passphrase before we get here (in
1439   // OnBackendInitialized()).
1440   DCHECK(cached_passphrase_.empty());
1441
1442   if (!sync_configure_start_time_.is_null()) {
1443     if (result.status == DataTypeManager::OK) {
1444       base::Time sync_configure_stop_time = base::Time::Now();
1445       base::TimeDelta delta = sync_configure_stop_time -
1446           sync_configure_start_time_;
1447       if (is_first_time_sync_configure_) {
1448         UMA_HISTOGRAM_LONG_TIMES("Sync.ServiceInitialConfigureTime", delta);
1449       } else {
1450         UMA_HISTOGRAM_LONG_TIMES("Sync.ServiceSubsequentConfigureTime",
1451                                   delta);
1452       }
1453     }
1454     sync_configure_start_time_ = base::Time();
1455   }
1456
1457   // Notify listeners that configuration is done.
1458   content::NotificationService::current()->Notify(
1459       chrome::NOTIFICATION_SYNC_CONFIGURE_DONE,
1460       content::Source<ProfileSyncService>(this),
1461       content::NotificationService::NoDetails());
1462
1463   DVLOG(1) << "PSS OnConfigureDone called with status: " << configure_status_;
1464   // The possible status values:
1465   //    ABORT - Configuration was aborted. This is not an error, if
1466   //            initiated by user.
1467   //    OK - Some or all types succeeded.
1468   //    Everything else is an UnrecoverableError. So treat it as such.
1469
1470   // First handle the abort case.
1471   if (configure_status_ == DataTypeManager::ABORTED &&
1472       expect_sync_configuration_aborted_) {
1473     DVLOG(0) << "ProfileSyncService::Observe Sync Configure aborted";
1474     expect_sync_configuration_aborted_ = false;
1475     return;
1476   }
1477
1478   // Handle unrecoverable error.
1479   if (configure_status_ != DataTypeManager::OK) {
1480     // Something catastrophic had happened. We should only have one
1481     // error representing it.
1482     syncer::SyncError error =
1483         data_type_status_table_.GetUnrecoverableError();
1484     DCHECK(error.IsSet());
1485     std::string message =
1486         "Sync configuration failed with status " +
1487         DataTypeManager::ConfigureStatusToString(configure_status_) +
1488         " caused by " +
1489         syncer::ModelTypeSetToString(
1490             data_type_status_table_.GetUnrecoverableErrorTypes()) +
1491         ": " + error.message();
1492     LOG(ERROR) << "ProfileSyncService error: " << message;
1493     OnInternalUnrecoverableError(error.location(),
1494                                  message,
1495                                  true,
1496                                  ERROR_REASON_CONFIGURATION_FAILURE);
1497     return;
1498   }
1499
1500   // We should never get in a state where we have no encrypted datatypes
1501   // enabled, and yet we still think we require a passphrase for decryption.
1502   DCHECK(!(IsPassphraseRequiredForDecryption() &&
1503            !IsEncryptedDatatypeEnabled()));
1504
1505   // This must be done before we start syncing with the server to avoid
1506   // sending unencrypted data up on a first time sync.
1507   if (encryption_pending_)
1508     backend_->EnableEncryptEverything();
1509   NotifyObservers();
1510
1511   if (migrator_.get() &&
1512       migrator_->state() != browser_sync::BackendMigrator::IDLE) {
1513     // Migration in progress.  Let the migrator know we just finished
1514     // configuring something.  It will be up to the migrator to call
1515     // StartSyncingWithServer() if migration is now finished.
1516     migrator_->OnConfigureDone(result);
1517   } else {
1518     StartSyncingWithServer();
1519   }
1520 }
1521
1522 void ProfileSyncService::OnConfigureStart() {
1523   sync_configure_start_time_ = base::Time::Now();
1524   NotifyObservers();
1525 }
1526
1527 ProfileSyncService::SyncStatusSummary
1528       ProfileSyncService::QuerySyncStatusSummary() {
1529   if (HasUnrecoverableError()) {
1530     return UNRECOVERABLE_ERROR;
1531   } else if (!backend_) {
1532     return NOT_ENABLED;
1533   } else if (backend_mode_ == BACKUP) {
1534     return BACKUP_USER_DATA;
1535   } else if (backend_mode_ == ROLLBACK) {
1536     return ROLLBACK_USER_DATA;
1537   } else if (backend_.get() && !HasSyncSetupCompleted()) {
1538     return SETUP_INCOMPLETE;
1539   } else if (
1540       backend_.get() && HasSyncSetupCompleted() &&
1541       directory_data_type_manager_.get() &&
1542       directory_data_type_manager_->state() == DataTypeManager::STOPPED) {
1543     return DATATYPES_NOT_INITIALIZED;
1544   } else if (SyncActive()) {
1545     return INITIALIZED;
1546   }
1547   return UNKNOWN_ERROR;
1548 }
1549
1550 std::string ProfileSyncService::QuerySyncStatusSummaryString() {
1551   SyncStatusSummary status = QuerySyncStatusSummary();
1552
1553   std::string config_status_str =
1554       configure_status_ != DataTypeManager::UNKNOWN ?
1555           DataTypeManager::ConfigureStatusToString(configure_status_) : "";
1556
1557   switch (status) {
1558     case UNRECOVERABLE_ERROR:
1559       return "Unrecoverable error detected";
1560     case NOT_ENABLED:
1561       return "Syncing not enabled";
1562     case SETUP_INCOMPLETE:
1563       return "First time sync setup incomplete";
1564     case DATATYPES_NOT_INITIALIZED:
1565       return "Datatypes not fully initialized";
1566     case INITIALIZED:
1567       return "Sync service initialized";
1568     case BACKUP_USER_DATA:
1569       return "Backing-up user data. Status: " + config_status_str;
1570     case ROLLBACK_USER_DATA:
1571       return "Restoring user data. Status: " + config_status_str;
1572     default:
1573       return "Status unknown: Internal error?";
1574   }
1575 }
1576
1577 std::string ProfileSyncService::GetBackendInitializationStateString() const {
1578   return startup_controller_->GetBackendInitializationStateString();
1579 }
1580
1581 bool ProfileSyncService::auto_start_enabled() const {
1582   return startup_controller_->auto_start_enabled();
1583 }
1584
1585 bool ProfileSyncService::setup_in_progress() const {
1586   return startup_controller_->setup_in_progress();
1587 }
1588
1589 bool ProfileSyncService::QueryDetailedSyncStatus(
1590     SyncBackendHost::Status* result) {
1591   if (backend_.get() && backend_initialized_) {
1592     *result = backend_->GetDetailedStatus();
1593     return true;
1594   } else {
1595     SyncBackendHost::Status status;
1596     status.sync_protocol_error = last_actionable_error_;
1597     *result = status;
1598     return false;
1599   }
1600 }
1601
1602 const AuthError& ProfileSyncService::GetAuthError() const {
1603   return last_auth_error_;
1604 }
1605
1606 bool ProfileSyncService::FirstSetupInProgress() const {
1607   return !HasSyncSetupCompleted() && startup_controller_->setup_in_progress();
1608 }
1609
1610 void ProfileSyncService::SetSetupInProgress(bool setup_in_progress) {
1611   // This method is a no-op if |setup_in_progress_| remains unchanged.
1612   if (startup_controller_->setup_in_progress() == setup_in_progress)
1613     return;
1614
1615   startup_controller_->set_setup_in_progress(setup_in_progress);
1616   if (!setup_in_progress && backend_initialized())
1617     ReconfigureDatatypeManager();
1618   NotifyObservers();
1619 }
1620
1621 bool ProfileSyncService::SyncActive() const {
1622   return backend_initialized_ && backend_mode_ == SYNC &&
1623          directory_data_type_manager_ &&
1624          directory_data_type_manager_->state() != DataTypeManager::STOPPED;
1625 }
1626
1627 bool ProfileSyncService::backend_initialized() const {
1628   return backend_initialized_;
1629 }
1630
1631 ProfileSyncService::BackendMode ProfileSyncService::backend_mode() const {
1632   return backend_mode_;
1633 }
1634
1635 bool ProfileSyncService::ConfigurationDone() const {
1636   return directory_data_type_manager_ &&
1637       directory_data_type_manager_->state() == DataTypeManager::CONFIGURED;
1638 }
1639
1640 bool ProfileSyncService::waiting_for_auth() const {
1641   return is_auth_in_progress_;
1642 }
1643
1644 const syncer::Experiments& ProfileSyncService::current_experiments() const {
1645   return current_experiments_;
1646 }
1647
1648 bool ProfileSyncService::HasUnrecoverableError() const {
1649   return unrecoverable_error_reason_ != ERROR_REASON_UNSET;
1650 }
1651
1652 bool ProfileSyncService::IsPassphraseRequired() const {
1653   return passphrase_required_reason_ !=
1654       syncer::REASON_PASSPHRASE_NOT_REQUIRED;
1655 }
1656
1657 bool ProfileSyncService::IsPassphraseRequiredForDecryption() const {
1658   // If there is an encrypted datatype enabled and we don't have the proper
1659   // passphrase, we must prompt the user for a passphrase. The only way for the
1660   // user to avoid entering their passphrase is to disable the encrypted types.
1661   return IsEncryptedDatatypeEnabled() && IsPassphraseRequired();
1662 }
1663
1664 base::string16 ProfileSyncService::GetLastSyncedTimeString() const {
1665   const base::Time last_synced_time = sync_prefs_.GetLastSyncedTime();
1666   if (last_synced_time.is_null())
1667     return l10n_util::GetStringUTF16(IDS_SYNC_TIME_NEVER);
1668
1669   base::TimeDelta time_since_last_sync = base::Time::Now() - last_synced_time;
1670
1671   if (time_since_last_sync < base::TimeDelta::FromMinutes(1))
1672     return l10n_util::GetStringUTF16(IDS_SYNC_TIME_JUST_NOW);
1673
1674   return ui::TimeFormat::Simple(ui::TimeFormat::FORMAT_ELAPSED,
1675                                 ui::TimeFormat::LENGTH_SHORT,
1676                                 time_since_last_sync);
1677 }
1678
1679 void ProfileSyncService::UpdateSelectedTypesHistogram(
1680     bool sync_everything, const syncer::ModelTypeSet chosen_types) const {
1681   if (!HasSyncSetupCompleted() ||
1682       sync_everything != sync_prefs_.HasKeepEverythingSynced()) {
1683     UMA_HISTOGRAM_BOOLEAN("Sync.SyncEverything", sync_everything);
1684   }
1685
1686   // Only log the data types that are shown in the sync settings ui.
1687   // Note: the order of these types must match the ordering of
1688   // the respective types in ModelType
1689   const sync_driver::user_selectable_type::UserSelectableSyncType
1690       user_selectable_types[] = {
1691     sync_driver::user_selectable_type::BOOKMARKS,
1692     sync_driver::user_selectable_type::PREFERENCES,
1693     sync_driver::user_selectable_type::PASSWORDS,
1694     sync_driver::user_selectable_type::AUTOFILL,
1695     sync_driver::user_selectable_type::THEMES,
1696     sync_driver::user_selectable_type::TYPED_URLS,
1697     sync_driver::user_selectable_type::EXTENSIONS,
1698     sync_driver::user_selectable_type::APPS,
1699     sync_driver::user_selectable_type::WIFI_CREDENTIAL,
1700     sync_driver::user_selectable_type::PROXY_TABS,
1701   };
1702
1703   static_assert(35 == syncer::MODEL_TYPE_COUNT,
1704                 "custom config histogram must be updated");
1705
1706   if (!sync_everything) {
1707     const syncer::ModelTypeSet current_types = GetPreferredDataTypes();
1708
1709     syncer::ModelTypeSet type_set = syncer::UserSelectableTypes();
1710     syncer::ModelTypeSet::Iterator it = type_set.First();
1711
1712     DCHECK_EQ(arraysize(user_selectable_types), type_set.Size());
1713
1714     for (size_t i = 0; i < arraysize(user_selectable_types) && it.Good();
1715          ++i, it.Inc()) {
1716       const syncer::ModelType type = it.Get();
1717       if (chosen_types.Has(type) &&
1718           (!HasSyncSetupCompleted() || !current_types.Has(type))) {
1719         // Selected type has changed - log it.
1720         UMA_HISTOGRAM_ENUMERATION(
1721             "Sync.CustomSync",
1722             user_selectable_types[i],
1723             sync_driver::user_selectable_type::SELECTABLE_DATATYPE_COUNT + 1);
1724       }
1725     }
1726   }
1727 }
1728
1729 #if defined(OS_CHROMEOS)
1730 void ProfileSyncService::RefreshSpareBootstrapToken(
1731     const std::string& passphrase) {
1732   sync_driver::SystemEncryptor encryptor;
1733   syncer::Cryptographer temp_cryptographer(&encryptor);
1734   // The first 2 params (hostname and username) doesn't have any effect here.
1735   syncer::KeyParams key_params = {"localhost", "dummy", passphrase};
1736
1737   std::string bootstrap_token;
1738   if (!temp_cryptographer.AddKey(key_params)) {
1739     NOTREACHED() << "Failed to add key to cryptographer.";
1740   }
1741   temp_cryptographer.GetBootstrapToken(&bootstrap_token);
1742   sync_prefs_.SetSpareBootstrapToken(bootstrap_token);
1743 }
1744 #endif
1745
1746 void ProfileSyncService::OnUserChoseDatatypes(
1747     bool sync_everything,
1748     syncer::ModelTypeSet chosen_types) {
1749   if (!backend_.get() && !HasUnrecoverableError()) {
1750     NOTREACHED();
1751     return;
1752   }
1753
1754   UpdateSelectedTypesHistogram(sync_everything, chosen_types);
1755   sync_prefs_.SetKeepEverythingSynced(sync_everything);
1756
1757   if (directory_data_type_manager_.get())
1758     directory_data_type_manager_->ResetDataTypeErrors();
1759   ChangePreferredDataTypes(chosen_types);
1760 }
1761
1762 void ProfileSyncService::ChangePreferredDataTypes(
1763     syncer::ModelTypeSet preferred_types) {
1764
1765   DVLOG(1) << "ChangePreferredDataTypes invoked";
1766   const syncer::ModelTypeSet registered_types = GetRegisteredDataTypes();
1767   const syncer::ModelTypeSet registered_preferred_types =
1768       Intersection(registered_types, preferred_types);
1769   sync_prefs_.SetPreferredDataTypes(registered_types,
1770                                     registered_preferred_types);
1771
1772   // Now reconfigure the DTM.
1773   ReconfigureDatatypeManager();
1774
1775   // TODO(rlarocque): Reconfigure the NonBlockingDataTypeManager, too.  Blocked
1776   // on crbug.com/368834.  Until that bug is fixed, it's difficult to tell
1777   // which types should be enabled and when.
1778 }
1779
1780 syncer::ModelTypeSet ProfileSyncService::GetActiveDataTypes() const {
1781   if (!SyncActive() || !ConfigurationDone())
1782     return syncer::ModelTypeSet();
1783   const syncer::ModelTypeSet preferred_types = GetPreferredDataTypes();
1784   const syncer::ModelTypeSet failed_types =
1785       data_type_status_table_.GetFailedTypes();
1786   return Difference(preferred_types, failed_types);
1787 }
1788
1789 syncer::ModelTypeSet ProfileSyncService::GetPreferredDataTypes() const {
1790   const syncer::ModelTypeSet registered_types = GetRegisteredDataTypes();
1791   const syncer::ModelTypeSet preferred_types =
1792       sync_prefs_.GetPreferredDataTypes(registered_types);
1793   const syncer::ModelTypeSet enforced_types =
1794       Intersection(GetDataTypesFromPreferenceProviders(), registered_types);
1795   return Union(preferred_types, enforced_types);
1796 }
1797
1798 syncer::ModelTypeSet
1799 ProfileSyncService::GetPreferredDirectoryDataTypes() const {
1800   const syncer::ModelTypeSet registered_directory_types =
1801       GetRegisteredDirectoryDataTypes();
1802   const syncer::ModelTypeSet preferred_types =
1803       sync_prefs_.GetPreferredDataTypes(registered_directory_types);
1804   const syncer::ModelTypeSet enforced_types =
1805       Intersection(GetDataTypesFromPreferenceProviders(),
1806                    registered_directory_types);
1807   return Union(preferred_types, enforced_types);
1808 }
1809
1810 syncer::ModelTypeSet
1811 ProfileSyncService::GetPreferredNonBlockingDataTypes() const {
1812   return sync_prefs_.GetPreferredDataTypes(GetRegisteredNonBlockingDataTypes());
1813 }
1814
1815 syncer::ModelTypeSet ProfileSyncService::GetForcedDataTypes() const {
1816   // TODO(treib,zea): When SyncPrefs also implements SyncTypePreferenceProvider,
1817   // we'll need another way to distinguish user-choosable types from
1818   // programmatically-enabled types.
1819   return GetDataTypesFromPreferenceProviders();
1820 }
1821
1822 syncer::ModelTypeSet ProfileSyncService::GetRegisteredDataTypes() const {
1823   return Union(GetRegisteredDirectoryDataTypes(),
1824                GetRegisteredNonBlockingDataTypes());
1825 }
1826
1827 syncer::ModelTypeSet
1828 ProfileSyncService::GetRegisteredDirectoryDataTypes() const {
1829   syncer::ModelTypeSet registered_types;
1830   // The directory_data_type_controllers_ are determined by command-line flags;
1831   // that's effectively what controls the values returned here.
1832   for (DataTypeController::TypeMap::const_iterator it =
1833        directory_data_type_controllers_.begin();
1834        it != directory_data_type_controllers_.end(); ++it) {
1835     registered_types.Put(it->first);
1836   }
1837   return registered_types;
1838 }
1839
1840 syncer::ModelTypeSet
1841 ProfileSyncService::GetRegisteredNonBlockingDataTypes() const {
1842   return non_blocking_data_type_manager_.GetRegisteredTypes();
1843 }
1844
1845 bool ProfileSyncService::IsUsingSecondaryPassphrase() const {
1846   syncer::PassphraseType passphrase_type = GetPassphraseType();
1847   return passphrase_type == syncer::FROZEN_IMPLICIT_PASSPHRASE ||
1848          passphrase_type == syncer::CUSTOM_PASSPHRASE;
1849 }
1850
1851 syncer::PassphraseType ProfileSyncService::GetPassphraseType() const {
1852   return backend_->GetPassphraseType();
1853 }
1854
1855 base::Time ProfileSyncService::GetExplicitPassphraseTime() const {
1856   return backend_->GetExplicitPassphraseTime();
1857 }
1858
1859 bool ProfileSyncService::IsCryptographerReady(
1860     const syncer::BaseTransaction* trans) const {
1861   return backend_.get() && backend_->IsCryptographerReady(trans);
1862 }
1863
1864 void ProfileSyncService::ConfigurePriorityDataTypes() {
1865   const syncer::ModelTypeSet priority_types =
1866       Intersection(GetPreferredDirectoryDataTypes(),
1867                    syncer::PriorityUserTypes());
1868   if (!priority_types.Empty()) {
1869     const syncer::ConfigureReason reason = HasSyncSetupCompleted() ?
1870         syncer::CONFIGURE_REASON_RECONFIGURATION :
1871         syncer::CONFIGURE_REASON_NEW_CLIENT;
1872     directory_data_type_manager_->Configure(priority_types, reason);
1873   }
1874 }
1875
1876 void ProfileSyncService::ConfigureDataTypeManager() {
1877   // Don't configure datatypes if the setup UI is still on the screen - this
1878   // is to help multi-screen setting UIs (like iOS) where they don't want to
1879   // start syncing data until the user is done configuring encryption options,
1880   // etc. ReconfigureDatatypeManager() will get called again once the UI calls
1881   // SetSetupInProgress(false).
1882   if (backend_mode_ == SYNC && startup_controller_->setup_in_progress())
1883     return;
1884
1885   bool restart = false;
1886   if (!directory_data_type_manager_) {
1887     restart = true;
1888     directory_data_type_manager_.reset(
1889         factory_->CreateDataTypeManager(debug_info_listener_,
1890                                         &directory_data_type_controllers_,
1891                                         this,
1892                                         backend_.get(),
1893                                         this));
1894
1895     // We create the migrator at the same time.
1896     migrator_.reset(
1897         new browser_sync::BackendMigrator(
1898             profile_->GetDebugName(), GetUserShare(),
1899             this, directory_data_type_manager_.get(),
1900             base::Bind(&ProfileSyncService::StartSyncingWithServer,
1901                        base::Unretained(this))));
1902   }
1903
1904   syncer::ModelTypeSet types;
1905   syncer::ConfigureReason reason = syncer::CONFIGURE_REASON_UNKNOWN;
1906   if (backend_mode_ == BACKUP || backend_mode_ == ROLLBACK) {
1907     types = syncer::BackupTypes();
1908     reason = syncer::CONFIGURE_REASON_BACKUP_ROLLBACK;
1909   } else {
1910     types = GetPreferredDirectoryDataTypes();
1911     if (!HasSyncSetupCompleted()) {
1912       reason = syncer::CONFIGURE_REASON_NEW_CLIENT;
1913     } else if (restart) {
1914       // Datatype downloads on restart are generally due to newly supported
1915       // datatypes (although it's also possible we're picking up where a failed
1916       // previous configuration left off).
1917       // TODO(sync): consider detecting configuration recovery and setting
1918       // the reason here appropriately.
1919       reason = syncer::CONFIGURE_REASON_NEWLY_ENABLED_DATA_TYPE;
1920     } else {
1921       // The user initiated a reconfiguration (either to add or remove types).
1922       reason = syncer::CONFIGURE_REASON_RECONFIGURATION;
1923     }
1924   }
1925
1926   directory_data_type_manager_->Configure(types, reason);
1927 }
1928
1929 syncer::UserShare* ProfileSyncService::GetUserShare() const {
1930   if (backend_.get() && backend_initialized_) {
1931     return backend_->GetUserShare();
1932   }
1933   NOTREACHED();
1934   return NULL;
1935 }
1936
1937 syncer::sessions::SyncSessionSnapshot
1938 ProfileSyncService::GetLastSessionSnapshot() const {
1939   if (backend_)
1940     return backend_->GetLastSessionSnapshot();
1941   return syncer::sessions::SyncSessionSnapshot();
1942 }
1943
1944 bool ProfileSyncService::HasUnsyncedItems() const {
1945   if (HasSyncingBackend() && backend_initialized_) {
1946     return backend_->HasUnsyncedItems();
1947   }
1948   NOTREACHED();
1949   return false;
1950 }
1951
1952 browser_sync::BackendMigrator*
1953 ProfileSyncService::GetBackendMigratorForTest() {
1954   return migrator_.get();
1955 }
1956
1957 void ProfileSyncService::GetModelSafeRoutingInfo(
1958     syncer::ModelSafeRoutingInfo* out) const {
1959   if (backend_.get() && backend_initialized_) {
1960     backend_->GetModelSafeRoutingInfo(out);
1961   } else {
1962     NOTREACHED();
1963   }
1964 }
1965
1966 base::Value* ProfileSyncService::GetTypeStatusMap() const {
1967   scoped_ptr<base::ListValue> result(new base::ListValue());
1968
1969   if (!backend_.get() || !backend_initialized_) {
1970     return result.release();
1971   }
1972
1973   DataTypeStatusTable::TypeErrorMap error_map =
1974       data_type_status_table_.GetAllErrors();
1975   ModelTypeSet active_types;
1976   ModelTypeSet passive_types;
1977   ModelSafeRoutingInfo routing_info;
1978   backend_->GetModelSafeRoutingInfo(&routing_info);
1979   for (ModelSafeRoutingInfo::const_iterator it = routing_info.begin();
1980        it != routing_info.end(); ++it) {
1981     if (it->second == syncer::GROUP_PASSIVE) {
1982       passive_types.Put(it->first);
1983     } else {
1984       active_types.Put(it->first);
1985     }
1986   }
1987
1988   SyncBackendHost::Status detailed_status = backend_->GetDetailedStatus();
1989   ModelTypeSet &throttled_types(detailed_status.throttled_types);
1990   ModelTypeSet registered = GetRegisteredDataTypes();
1991   scoped_ptr<base::DictionaryValue> type_status_header(
1992       new base::DictionaryValue());
1993
1994   type_status_header->SetString("name", "Model Type");
1995   type_status_header->SetString("status", "header");
1996   type_status_header->SetString("value", "Group Type");
1997   type_status_header->SetString("num_entries", "Total Entries");
1998   type_status_header->SetString("num_live", "Live Entries");
1999   result->Append(type_status_header.release());
2000
2001   scoped_ptr<base::DictionaryValue> type_status;
2002   for (ModelTypeSet::Iterator it = registered.First(); it.Good(); it.Inc()) {
2003     ModelType type = it.Get();
2004
2005     type_status.reset(new base::DictionaryValue());
2006     type_status->SetString("name", ModelTypeToString(type));
2007
2008     if (error_map.find(type) != error_map.end()) {
2009       const syncer::SyncError &error = error_map.find(type)->second;
2010       DCHECK(error.IsSet());
2011       switch (error.GetSeverity()) {
2012         case syncer::SyncError::SYNC_ERROR_SEVERITY_ERROR: {
2013             std::string error_text = "Error: " + error.location().ToString() +
2014                 ", " + error.GetMessagePrefix() + error.message();
2015             type_status->SetString("status", "error");
2016             type_status->SetString("value", error_text);
2017           }
2018           break;
2019         case syncer::SyncError::SYNC_ERROR_SEVERITY_INFO:
2020           type_status->SetString("status", "disabled");
2021           type_status->SetString("value", error.message());
2022           break;
2023         default:
2024           NOTREACHED() << "Unexpected error severity.";
2025           break;
2026       }
2027     } else if (syncer::IsProxyType(type) && passive_types.Has(type)) {
2028       // Show a proxy type in "ok" state unless it is disabled by user.
2029       DCHECK(!throttled_types.Has(type));
2030       type_status->SetString("status", "ok");
2031       type_status->SetString("value", "Passive");
2032     } else if (throttled_types.Has(type) && passive_types.Has(type)) {
2033       type_status->SetString("status", "warning");
2034       type_status->SetString("value", "Passive, Throttled");
2035     } else if (passive_types.Has(type)) {
2036       type_status->SetString("status", "warning");
2037       type_status->SetString("value", "Passive");
2038     } else if (throttled_types.Has(type)) {
2039       type_status->SetString("status", "warning");
2040       type_status->SetString("value", "Throttled");
2041     } else if (GetRegisteredNonBlockingDataTypes().Has(type)) {
2042       type_status->SetString("status", "ok");
2043       type_status->SetString("value", "Non-Blocking");
2044     } else if (active_types.Has(type)) {
2045       type_status->SetString("status", "ok");
2046       type_status->SetString("value", "Active: " +
2047                              ModelSafeGroupToString(routing_info[type]));
2048     } else {
2049       type_status->SetString("status", "warning");
2050       type_status->SetString("value", "Disabled by User");
2051     }
2052
2053     int live_count = detailed_status.num_entries_by_type[type] -
2054         detailed_status.num_to_delete_entries_by_type[type];
2055     type_status->SetInteger("num_entries",
2056                             detailed_status.num_entries_by_type[type]);
2057     type_status->SetInteger("num_live", live_count);
2058
2059     result->Append(type_status.release());
2060   }
2061   return result.release();
2062 }
2063
2064 void ProfileSyncService::DeactivateDataType(syncer::ModelType type) {
2065   if (!backend_)
2066     return;
2067   backend_->DeactivateDataType(type);
2068 }
2069
2070 void ProfileSyncService::ConsumeCachedPassphraseIfPossible() {
2071   // If no cached passphrase, or sync backend hasn't started up yet, just exit.
2072   // If the backend isn't running yet, OnBackendInitialized() will call this
2073   // method again after the backend starts up.
2074   if (cached_passphrase_.empty() || !backend_initialized())
2075     return;
2076
2077   // Backend is up and running, so we can consume the cached passphrase.
2078   std::string passphrase = cached_passphrase_;
2079   cached_passphrase_.clear();
2080
2081   // If we need a passphrase to decrypt data, try the cached passphrase.
2082   if (passphrase_required_reason() == syncer::REASON_DECRYPTION) {
2083     if (SetDecryptionPassphrase(passphrase)) {
2084       DVLOG(1) << "Cached passphrase successfully decrypted pending keys";
2085       return;
2086     }
2087   }
2088
2089   // If we get here, we don't have pending keys (or at least, the passphrase
2090   // doesn't decrypt them) - just try to re-encrypt using the encryption
2091   // passphrase.
2092   if (!IsUsingSecondaryPassphrase())
2093     SetEncryptionPassphrase(passphrase, IMPLICIT);
2094 }
2095
2096 void ProfileSyncService::RequestAccessToken() {
2097   // Only one active request at a time.
2098   if (access_token_request_ != NULL)
2099     return;
2100   request_access_token_retry_timer_.Stop();
2101   OAuth2TokenService::ScopeSet oauth2_scopes;
2102   oauth2_scopes.insert(signin_->GetSyncScopeToUse());
2103
2104   // Invalidate previous token, otherwise token service will return the same
2105   // token again.
2106   const std::string& account_id = signin_->GetAccountIdToUse();
2107   if (!access_token_.empty()) {
2108     oauth2_token_service_->InvalidateToken(
2109         account_id, oauth2_scopes, access_token_);
2110   }
2111
2112   access_token_.clear();
2113
2114   token_request_time_ = base::Time::Now();
2115   token_receive_time_ = base::Time();
2116   next_token_request_time_ = base::Time();
2117   access_token_request_ =
2118       oauth2_token_service_->StartRequest(account_id, oauth2_scopes, this);
2119 }
2120
2121 void ProfileSyncService::SetEncryptionPassphrase(const std::string& passphrase,
2122                                                  PassphraseType type) {
2123   // This should only be called when the backend has been initialized.
2124   DCHECK(backend_initialized());
2125   DCHECK(!(type == IMPLICIT && IsUsingSecondaryPassphrase())) <<
2126       "Data is already encrypted using an explicit passphrase";
2127   DCHECK(!(type == EXPLICIT &&
2128            passphrase_required_reason_ == syncer::REASON_DECRYPTION)) <<
2129          "Can not set explicit passphrase when decryption is needed.";
2130
2131   DVLOG(1) << "Setting " << (type == EXPLICIT ? "explicit" : "implicit")
2132            << " passphrase for encryption.";
2133   if (passphrase_required_reason_ == syncer::REASON_ENCRYPTION) {
2134     // REASON_ENCRYPTION implies that the cryptographer does not have pending
2135     // keys. Hence, as long as we're not trying to do an invalid passphrase
2136     // change (e.g. explicit -> explicit or explicit -> implicit), we know this
2137     // will succeed. If for some reason a new encryption key arrives via
2138     // sync later, the SBH will trigger another OnPassphraseRequired().
2139     passphrase_required_reason_ = syncer::REASON_PASSPHRASE_NOT_REQUIRED;
2140     NotifyObservers();
2141   }
2142   backend_->SetEncryptionPassphrase(passphrase, type == EXPLICIT);
2143 }
2144
2145 bool ProfileSyncService::SetDecryptionPassphrase(
2146     const std::string& passphrase) {
2147   if (IsPassphraseRequired()) {
2148     DVLOG(1) << "Setting passphrase for decryption.";
2149     return backend_->SetDecryptionPassphrase(passphrase);
2150   } else {
2151     NOTREACHED() << "SetDecryptionPassphrase must not be called when "
2152                     "IsPassphraseRequired() is false.";
2153     return false;
2154   }
2155 }
2156
2157 bool ProfileSyncService::EncryptEverythingAllowed() const {
2158   return encrypt_everything_allowed_;
2159 }
2160
2161 void ProfileSyncService::SetEncryptEverythingAllowed(bool allowed) {
2162   DCHECK(allowed || !backend_initialized() || !EncryptEverythingEnabled());
2163   encrypt_everything_allowed_ = allowed;
2164 }
2165
2166 void ProfileSyncService::EnableEncryptEverything() {
2167   DCHECK(EncryptEverythingAllowed());
2168
2169   // Tests override backend_initialized() to always return true, so we
2170   // must check that instead of |backend_initialized_|.
2171   // TODO(akalin): Fix the above. :/
2172   DCHECK(backend_initialized());
2173   // TODO(atwilson): Persist the encryption_pending_ flag to address the various
2174   // problems around cancelling encryption in the background (crbug.com/119649).
2175   if (!encrypt_everything_)
2176     encryption_pending_ = true;
2177 }
2178
2179 bool ProfileSyncService::encryption_pending() const {
2180   // We may be called during the setup process before we're
2181   // initialized (via IsEncryptedDatatypeEnabled and
2182   // IsPassphraseRequiredForDecryption).
2183   return encryption_pending_;
2184 }
2185
2186 bool ProfileSyncService::EncryptEverythingEnabled() const {
2187   DCHECK(backend_initialized_);
2188   return encrypt_everything_ || encryption_pending_;
2189 }
2190
2191 syncer::ModelTypeSet ProfileSyncService::GetEncryptedDataTypes() const {
2192   DCHECK(encrypted_types_.Has(syncer::PASSWORDS));
2193   // We may be called during the setup process before we're
2194   // initialized.  In this case, we default to the sensitive types.
2195   return encrypted_types_;
2196 }
2197
2198 void ProfileSyncService::OnSyncManagedPrefChange(bool is_sync_managed) {
2199   if (is_sync_managed) {
2200     DisableForUser();
2201   } else {
2202     // Sync is no longer disabled by policy. Try starting it up if appropriate.
2203     startup_controller_->TryStart();
2204   }
2205 }
2206
2207 void ProfileSyncService::GoogleSigninSucceeded(const std::string& account_id,
2208                                                const std::string& username,
2209                                                const std::string& password) {
2210   if (!sync_prefs_.IsStartSuppressed() && !password.empty()) {
2211     cached_passphrase_ = password;
2212     // Try to consume the passphrase we just cached. If the sync backend
2213     // is not running yet, the passphrase will remain cached until the
2214     // backend starts up.
2215     ConsumeCachedPassphraseIfPossible();
2216   }
2217 #if defined(OS_CHROMEOS)
2218   RefreshSpareBootstrapToken(password);
2219 #endif
2220   if (!backend_initialized() || GetAuthError().state() != AuthError::NONE) {
2221     // Track the fact that we're still waiting for auth to complete.
2222     is_auth_in_progress_ = true;
2223   }
2224 }
2225
2226 void ProfileSyncService::GoogleSignedOut(const std::string& account_id,
2227                                          const std::string& username) {
2228   sync_disabled_by_admin_ = false;
2229   DisableForUser();
2230
2231   if (browser_sync::BackupRollbackController::IsBackupEnabled()) {
2232     need_backup_ = true;
2233     backup_finished_ = false;
2234   }
2235 }
2236
2237 void ProfileSyncService::AddObserver(
2238     sync_driver::SyncServiceObserver* observer) {
2239   observers_.AddObserver(observer);
2240 }
2241
2242 void ProfileSyncService::RemoveObserver(
2243     sync_driver::SyncServiceObserver* observer) {
2244   observers_.RemoveObserver(observer);
2245 }
2246
2247 void ProfileSyncService::AddProtocolEventObserver(
2248     browser_sync::ProtocolEventObserver* observer) {
2249   protocol_event_observers_.AddObserver(observer);
2250   if (HasSyncingBackend()) {
2251     backend_->RequestBufferedProtocolEventsAndEnableForwarding();
2252   }
2253 }
2254
2255 void ProfileSyncService::RemoveProtocolEventObserver(
2256     browser_sync::ProtocolEventObserver* observer) {
2257   protocol_event_observers_.RemoveObserver(observer);
2258   if (HasSyncingBackend() &&
2259       !protocol_event_observers_.might_have_observers()) {
2260     backend_->DisableProtocolEventForwarding();
2261   }
2262 }
2263
2264 void ProfileSyncService::AddTypeDebugInfoObserver(
2265     syncer::TypeDebugInfoObserver* type_debug_info_observer) {
2266   type_debug_info_observers_.AddObserver(type_debug_info_observer);
2267   if (type_debug_info_observers_.might_have_observers() &&
2268       backend_initialized_) {
2269     backend_->EnableDirectoryTypeDebugInfoForwarding();
2270   }
2271 }
2272
2273 void ProfileSyncService::RemoveTypeDebugInfoObserver(
2274     syncer::TypeDebugInfoObserver* type_debug_info_observer) {
2275   type_debug_info_observers_.RemoveObserver(type_debug_info_observer);
2276   if (!type_debug_info_observers_.might_have_observers() &&
2277       backend_initialized_) {
2278     backend_->DisableDirectoryTypeDebugInfoForwarding();
2279   }
2280 }
2281
2282 void ProfileSyncService::AddPreferenceProvider(
2283     SyncTypePreferenceProvider* provider) {
2284   DCHECK(!HasPreferenceProvider(provider))
2285       << "Providers may only be added once!";
2286   preference_providers_.insert(provider);
2287 }
2288
2289 void ProfileSyncService::RemovePreferenceProvider(
2290     SyncTypePreferenceProvider* provider) {
2291   DCHECK(HasPreferenceProvider(provider))
2292       << "Only providers that have been added before can be removed!";
2293   preference_providers_.erase(provider);
2294 }
2295
2296 bool ProfileSyncService::HasPreferenceProvider(
2297     SyncTypePreferenceProvider* provider) const {
2298   return preference_providers_.count(provider) > 0;
2299 }
2300
2301 namespace {
2302
2303 class GetAllNodesRequestHelper
2304     : public base::RefCountedThreadSafe<GetAllNodesRequestHelper> {
2305  public:
2306   GetAllNodesRequestHelper(
2307       syncer::ModelTypeSet requested_types,
2308       const base::Callback<void(scoped_ptr<base::ListValue>)>& callback);
2309
2310   void OnReceivedNodesForTypes(
2311       const std::vector<syncer::ModelType>& types,
2312       ScopedVector<base::ListValue> scoped_node_lists);
2313
2314  private:
2315   friend class base::RefCountedThreadSafe<GetAllNodesRequestHelper>;
2316   virtual ~GetAllNodesRequestHelper();
2317
2318   scoped_ptr<base::ListValue> result_accumulator_;
2319
2320   syncer::ModelTypeSet awaiting_types_;
2321   base::Callback<void(scoped_ptr<base::ListValue>)> callback_;
2322 };
2323
2324 GetAllNodesRequestHelper::GetAllNodesRequestHelper(
2325     syncer::ModelTypeSet requested_types,
2326     const base::Callback<void(scoped_ptr<base::ListValue>)>& callback)
2327     : result_accumulator_(new base::ListValue()),
2328       awaiting_types_(requested_types),
2329       callback_(callback) {}
2330
2331 GetAllNodesRequestHelper::~GetAllNodesRequestHelper() {
2332   if (!awaiting_types_.Empty()) {
2333     DLOG(WARNING)
2334         << "GetAllNodesRequest deleted before request was fulfilled.  "
2335         << "Missing types are: " << ModelTypeSetToString(awaiting_types_);
2336   }
2337 }
2338
2339 // Called when the set of nodes for a type or set of types has been returned.
2340 //
2341 // The nodes for several types can be returned at the same time by specifying
2342 // their types in the |types| array, and putting their results at the
2343 // correspnding indices in the |scoped_node_lists|.
2344 void GetAllNodesRequestHelper::OnReceivedNodesForTypes(
2345     const std::vector<syncer::ModelType>& types,
2346     ScopedVector<base::ListValue> scoped_node_lists) {
2347   DCHECK_EQ(types.size(), scoped_node_lists.size());
2348
2349   // Take unsafe ownership of the node list.
2350   std::vector<base::ListValue*> node_lists;
2351   scoped_node_lists.release(&node_lists);
2352
2353   for (size_t i = 0; i < node_lists.size() && i < types.size(); ++i) {
2354     const ModelType type = types[i];
2355     base::ListValue* node_list = node_lists[i];
2356
2357     // Add these results to our list.
2358     scoped_ptr<base::DictionaryValue> type_dict(new base::DictionaryValue());
2359     type_dict->SetString("type", ModelTypeToString(type));
2360     type_dict->Set("nodes", node_list);
2361     result_accumulator_->Append(type_dict.release());
2362
2363     // Remember that this part of the request is satisfied.
2364     awaiting_types_.Remove(type);
2365   }
2366
2367   if (awaiting_types_.Empty()) {
2368     callback_.Run(result_accumulator_.Pass());
2369     callback_.Reset();
2370   }
2371 }
2372
2373 }  // namespace
2374
2375 void ProfileSyncService::GetAllNodes(
2376     const base::Callback<void(scoped_ptr<base::ListValue>)>& callback) {
2377   ModelTypeSet directory_types = GetRegisteredDirectoryDataTypes();
2378   directory_types.PutAll(syncer::ControlTypes());
2379   scoped_refptr<GetAllNodesRequestHelper> helper =
2380       new GetAllNodesRequestHelper(directory_types, callback);
2381
2382   if (!backend_initialized_) {
2383     // If there's no backend available to fulfill the request, handle it here.
2384     ScopedVector<base::ListValue> empty_results;
2385     std::vector<ModelType> type_vector;
2386     for (ModelTypeSet::Iterator it = directory_types.First();
2387          it.Good(); it.Inc()) {
2388       type_vector.push_back(it.Get());
2389       empty_results.push_back(new base::ListValue());
2390     }
2391     helper->OnReceivedNodesForTypes(type_vector, empty_results.Pass());
2392   } else {
2393     backend_->GetAllNodesForTypes(
2394         directory_types,
2395         base::Bind(&GetAllNodesRequestHelper::OnReceivedNodesForTypes, helper));
2396   }
2397 }
2398
2399 bool ProfileSyncService::HasObserver(
2400     const sync_driver::SyncServiceObserver* observer) const {
2401   return observers_.HasObserver(observer);
2402 }
2403
2404 base::WeakPtr<syncer::JsController> ProfileSyncService::GetJsController() {
2405   return sync_js_controller_.AsWeakPtr();
2406 }
2407
2408 void ProfileSyncService::SyncEvent(SyncEventCodes code) {
2409   UMA_HISTOGRAM_ENUMERATION("Sync.EventCodes", code, MAX_SYNC_EVENT_CODE);
2410 }
2411
2412 // static
2413 bool ProfileSyncService::IsSyncEnabled() {
2414   // We have switches::kEnableSync just in case we need to change back to
2415   // sync-disabled-by-default on a platform.
2416   return !base::CommandLine::ForCurrentProcess()->HasSwitch(
2417       switches::kDisableSync);
2418 }
2419
2420 bool ProfileSyncService::IsManaged() const {
2421   return sync_prefs_.IsManaged() || sync_disabled_by_admin_;
2422 }
2423
2424 void ProfileSyncService::StopAndSuppress() {
2425   sync_prefs_.SetStartSuppressed(true);
2426   if (HasSyncingBackend()) {
2427     backend_->UnregisterInvalidationIds();
2428   }
2429   ShutdownImpl(syncer::STOP_SYNC);
2430 }
2431
2432 bool ProfileSyncService::IsStartSuppressed() const {
2433   return sync_prefs_.IsStartSuppressed();
2434 }
2435
2436 SigninManagerBase* ProfileSyncService::signin() const {
2437   if (!signin_)
2438     return NULL;
2439   return signin_->GetOriginal();
2440 }
2441
2442 void ProfileSyncService::UnsuppressAndStart() {
2443   DCHECK(profile_);
2444   sync_prefs_.SetStartSuppressed(false);
2445   DCHECK(!signin_.get() || signin_->GetOriginal()->IsAuthenticated());
2446   startup_controller_->TryStart();
2447 }
2448
2449 void ProfileSyncService::ReconfigureDatatypeManager() {
2450   // If we haven't initialized yet, don't configure the DTM as it could cause
2451   // association to start before a Directory has even been created.
2452   if (backend_initialized_) {
2453     DCHECK(backend_.get());
2454     ConfigureDataTypeManager();
2455   } else if (HasUnrecoverableError()) {
2456     // There is nothing more to configure. So inform the listeners,
2457     NotifyObservers();
2458
2459     DVLOG(1) << "ConfigureDataTypeManager not invoked because of an "
2460              << "Unrecoverable error.";
2461   } else {
2462     DVLOG(0) << "ConfigureDataTypeManager not invoked because backend is not "
2463              << "initialized";
2464   }
2465 }
2466
2467 syncer::ModelTypeSet ProfileSyncService::GetDataTypesFromPreferenceProviders()
2468     const {
2469   syncer::ModelTypeSet types;
2470   for (std::set<SyncTypePreferenceProvider*>::const_iterator it =
2471            preference_providers_.begin();
2472        it != preference_providers_.end();
2473        ++it) {
2474     types.PutAll((*it)->GetPreferredDataTypes());
2475   }
2476   return types;
2477 }
2478
2479 const DataTypeStatusTable& ProfileSyncService::data_type_status_table()
2480     const {
2481   return data_type_status_table_;
2482 }
2483
2484 void ProfileSyncService::OnInternalUnrecoverableError(
2485     const tracked_objects::Location& from_here,
2486     const std::string& message,
2487     bool delete_sync_database,
2488     UnrecoverableErrorReason reason) {
2489   DCHECK(!HasUnrecoverableError());
2490   unrecoverable_error_reason_ = reason;
2491   OnUnrecoverableErrorImpl(from_here, message, delete_sync_database);
2492 }
2493
2494 syncer::SyncManagerFactory::MANAGER_TYPE
2495 ProfileSyncService::GetManagerType() const {
2496   switch (backend_mode_) {
2497     case SYNC:
2498       return syncer::SyncManagerFactory::NORMAL;
2499     case BACKUP:
2500       return syncer::SyncManagerFactory::BACKUP;
2501     case ROLLBACK:
2502       return syncer::SyncManagerFactory::ROLLBACK;
2503     case IDLE:
2504       NOTREACHED();
2505   }
2506   return syncer::SyncManagerFactory::NORMAL;
2507 }
2508
2509 bool ProfileSyncService::IsRetryingAccessTokenFetchForTest() const {
2510   return request_access_token_retry_timer_.IsRunning();
2511 }
2512
2513 std::string ProfileSyncService::GetAccessTokenForTest() const {
2514   return access_token_;
2515 }
2516
2517 WeakHandle<syncer::JsEventHandler> ProfileSyncService::GetJsEventHandler() {
2518   return MakeWeakHandle(sync_js_controller_.AsWeakPtr());
2519 }
2520
2521 syncer::SyncableService* ProfileSyncService::GetSessionsSyncableService() {
2522   return sessions_sync_manager_.get();
2523 }
2524
2525 syncer::SyncableService* ProfileSyncService::GetDeviceInfoSyncableService() {
2526   return device_info_sync_service_.get();
2527 }
2528
2529 ProfileSyncService::SyncTokenStatus::SyncTokenStatus()
2530     : connection_status(syncer::CONNECTION_NOT_ATTEMPTED),
2531       last_get_token_error(GoogleServiceAuthError::AuthErrorNone()) {}
2532 ProfileSyncService::SyncTokenStatus::~SyncTokenStatus() {}
2533
2534 ProfileSyncService::SyncTokenStatus
2535 ProfileSyncService::GetSyncTokenStatus() const {
2536   SyncTokenStatus status;
2537   status.connection_status_update_time = connection_status_update_time_;
2538   status.connection_status = connection_status_;
2539   status.token_request_time = token_request_time_;
2540   status.token_receive_time = token_receive_time_;
2541   status.last_get_token_error = last_get_token_error_;
2542   if (request_access_token_retry_timer_.IsRunning())
2543     status.next_token_request_time = next_token_request_time_;
2544   return status;
2545 }
2546
2547 void ProfileSyncService::OverrideNetworkResourcesForTest(
2548     scoped_ptr<syncer::NetworkResources> network_resources) {
2549   network_resources_ = network_resources.Pass();
2550 }
2551
2552 bool ProfileSyncService::HasSyncingBackend() const {
2553   return backend_mode_ != SYNC ? false : backend_ != NULL;
2554 }
2555
2556 void ProfileSyncService::UpdateFirstSyncTimePref() {
2557   if (signin_->GetEffectiveUsername().empty()) {
2558     // Clear if user's not signed in and rollback is done.
2559     if (backend_mode_ != ROLLBACK)
2560       sync_prefs_.ClearFirstSyncTime();
2561   } else if (sync_prefs_.GetFirstSyncTime().is_null() &&
2562       backend_mode_ == SYNC) {
2563     // Set if not set before and it's syncing now.
2564     sync_prefs_.SetFirstSyncTime(base::Time::Now());
2565   }
2566 }
2567
2568 void ProfileSyncService::ClearBrowsingDataSinceFirstSync() {
2569   base::Time first_sync_time = sync_prefs_.GetFirstSyncTime();
2570   if (first_sync_time.is_null())
2571     return;
2572
2573   clear_browsing_data_.Run(browsing_data_remover_observer_,
2574                            profile_,
2575                            first_sync_time,
2576                            base::Time::Now());
2577 }
2578
2579 void ProfileSyncService::SetBrowsingDataRemoverObserverForTesting(
2580     BrowsingDataRemover::Observer* observer) {
2581   browsing_data_remover_observer_ = observer;
2582 }
2583
2584 void ProfileSyncService::SetClearingBrowseringDataForTesting(
2585     base::Callback<void(BrowsingDataRemover::Observer* observer,
2586                         Profile*,
2587                         base::Time,
2588                         base::Time)> c) {
2589   clear_browsing_data_ = c;
2590 }
2591
2592 GURL ProfileSyncService::GetSyncServiceURL(
2593     const base::CommandLine& command_line) {
2594   // By default, dev, canary, and unbranded Chromium users will go to the
2595   // development servers. Development servers have more features than standard
2596   // sync servers. Users with officially-branded Chrome stable and beta builds
2597   // will go to the standard sync servers.
2598   GURL result(kDevServerUrl);
2599
2600   chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
2601   if (channel == chrome::VersionInfo::CHANNEL_STABLE ||
2602       channel == chrome::VersionInfo::CHANNEL_BETA) {
2603     result = GURL(kSyncServerUrl);
2604   }
2605
2606   // Override the sync server URL from the command-line, if sync server
2607   // command-line argument exists.
2608   if (command_line.HasSwitch(switches::kSyncServiceURL)) {
2609     std::string value(command_line.GetSwitchValueASCII(
2610         switches::kSyncServiceURL));
2611     if (!value.empty()) {
2612       GURL custom_sync_url(value);
2613       if (custom_sync_url.is_valid()) {
2614         result = custom_sync_url;
2615       } else {
2616         LOG(WARNING) << "The following sync URL specified at the command-line "
2617                      << "is invalid: " << value;
2618       }
2619     }
2620   }
2621   return result;
2622 }
2623
2624 void ProfileSyncService::CheckSyncBackupIfNeeded() {
2625   DCHECK_EQ(backend_mode_, SYNC);
2626
2627 #if defined(ENABLE_PRE_SYNC_BACKUP)
2628   const base::Time last_synced_time = sync_prefs_.GetLastSyncedTime();
2629   // Check backup once a day.
2630   if (!last_backup_time_ &&
2631       (last_synced_time.is_null() ||
2632           base::Time::Now() - last_synced_time >=
2633               base::TimeDelta::FromDays(1))) {
2634     // If sync thread is set, need to serialize check on sync thread after
2635     // closing backup DB.
2636     if (sync_thread_) {
2637       sync_thread_->message_loop_proxy()->PostTask(
2638           FROM_HERE,
2639           base::Bind(syncer::CheckSyncDbLastModifiedTime,
2640                      profile_->GetPath().Append(kSyncBackupDataFolderName),
2641                      base::MessageLoopProxy::current(),
2642                      base::Bind(&ProfileSyncService::CheckSyncBackupCallback,
2643                                 weak_factory_.GetWeakPtr())));
2644     } else {
2645       content::BrowserThread::PostTask(
2646           content::BrowserThread::FILE, FROM_HERE,
2647           base::Bind(syncer::CheckSyncDbLastModifiedTime,
2648                      profile_->GetPath().Append(kSyncBackupDataFolderName),
2649                      base::MessageLoopProxy::current(),
2650                      base::Bind(&ProfileSyncService::CheckSyncBackupCallback,
2651                                 weak_factory_.GetWeakPtr())));
2652     }
2653   }
2654 #endif
2655 }
2656
2657 void ProfileSyncService::CheckSyncBackupCallback(base::Time backup_time) {
2658   last_backup_time_.reset(new base::Time(backup_time));
2659
2660   DCHECK(device_info_sync_service_);
2661   device_info_sync_service_->UpdateLocalDeviceBackupTime(*last_backup_time_);
2662 }
2663
2664 void ProfileSyncService::TryStartSyncAfterBackup() {
2665   startup_controller_->Reset(GetRegisteredDataTypes());
2666   startup_controller_->TryStart();
2667 }
2668
2669 void ProfileSyncService::CleanUpBackup() {
2670   sync_prefs_.ClearFirstSyncTime();
2671   profile_->GetIOTaskRunner()->PostTask(
2672       FROM_HERE,
2673       base::Bind(base::IgnoreResult(base::DeleteFile),
2674                  profile_->GetPath().Append(kSyncBackupDataFolderName),
2675                  true));
2676 }
2677
2678 bool ProfileSyncService::NeedBackup() const {
2679   return need_backup_;
2680 }
2681
2682 base::Time ProfileSyncService::GetDeviceBackupTimeForTesting() const {
2683   return device_info_sync_service_->GetLocalDeviceBackupTime();
2684 }
2685
2686 void ProfileSyncService::FlushDirectory() const {
2687   // backend_initialized_ implies backend_ isn't NULL and the manager exists.
2688   // If sync is not initialized yet, we fail silently.
2689   if (backend_initialized_)
2690     backend_->FlushDirectory();
2691 }
2692
2693 base::FilePath ProfileSyncService::GetDirectoryPathForTest() const {
2694   return directory_path_;
2695 }
2696
2697 base::MessageLoop* ProfileSyncService::GetSyncLoopForTest() const {
2698   if (sync_thread_) {
2699     return sync_thread_->message_loop();
2700   } else if (backend_) {
2701     return backend_->GetSyncLoopForTesting();
2702   } else {
2703     return NULL;
2704   }
2705 }
2706
2707 void ProfileSyncService::RemoveClientFromServer() const {
2708   if (!backend_initialized_) return;
2709   const std::string cache_guid = local_device_->GetLocalSyncCacheGUID();
2710   std::string birthday;
2711   syncer::UserShare* user_share = GetUserShare();
2712   if (user_share && user_share->directory.get()) {
2713     birthday = user_share->directory->store_birthday();
2714   }
2715   if (!access_token_.empty() && !cache_guid.empty() && !birthday.empty()) {
2716     sync_stopped_reporter_->ReportSyncStopped(
2717         access_token_, cache_guid, birthday);
2718   }
2719 }