sync/internal_api/sync_manager_impl.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 "sync/internal_api/sync_manager_impl.h"
   6
   7 #include <string>
   8
   9 #include "base/base64.h"
  10 #include "base/bind.h"
  11 #include "base/callback.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/json/json_writer.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/metrics/histogram.h"
  16 #include "base/observer_list.h"
  17 #include "base/strings/string_number_conversions.h"
  18 #include "base/values.h"
  19 #include "sync/engine/sync_scheduler.h"
  20 #include "sync/engine/syncer_types.h"
  21 #include "sync/internal_api/change_reorder_buffer.h"
  22 #include "sync/internal_api/public/base/cancelation_signal.h"
  23 #include "sync/internal_api/public/base/model_type.h"
  24 #include "sync/internal_api/public/base_node.h"
  25 #include "sync/internal_api/public/configure_reason.h"
  26 #include "sync/internal_api/public/engine/polling_constants.h"
  27 #include "sync/internal_api/public/http_post_provider_factory.h"
  28 #include "sync/internal_api/public/internal_components_factory.h"
  29 #include "sync/internal_api/public/read_node.h"
  30 #include "sync/internal_api/public/read_transaction.h"
  31 #include "sync/internal_api/public/sync_core_proxy.h"
  32 #include "sync/internal_api/public/user_share.h"
  33 #include "sync/internal_api/public/util/experiments.h"
  34 #include "sync/internal_api/public/write_node.h"
  35 #include "sync/internal_api/public/write_transaction.h"
  36 #include "sync/internal_api/sync_core.h"
  37 #include "sync/internal_api/sync_core_proxy_impl.h"
  38 #include "sync/internal_api/syncapi_internal.h"
  39 #include "sync/internal_api/syncapi_server_connection_manager.h"
  40 #include "sync/notifier/invalidation_util.h"
  41 #include "sync/notifier/invalidator.h"
  42 #include "sync/notifier/object_id_invalidation_map.h"
  43 #include "sync/protocol/proto_value_conversions.h"
  44 #include "sync/protocol/sync.pb.h"
  45 #include "sync/sessions/directory_type_debug_info_emitter.h"
  46 #include "sync/syncable/directory.h"
  47 #include "sync/syncable/entry.h"
  48 #include "sync/syncable/in_memory_directory_backing_store.h"
  49 #include "sync/syncable/on_disk_directory_backing_store.h"
  50
  51 using base::TimeDelta;
  52 using sync_pb::GetUpdatesCallerInfo;
  53
  54 namespace syncer {
  55
  56 using sessions::SyncSessionContext;
  57 using syncable::ImmutableWriteTransactionInfo;
  58 using syncable::SPECIFICS;
  59 using syncable::UNIQUE_POSITION;
  60
  61 namespace {
  62
  63 // Delays for syncer nudges.
  64 static const int kDefaultNudgeDelayMilliseconds = 200;
  65 static const int kPreferencesNudgeDelayMilliseconds = 2000;
  66 static const int kSyncRefreshDelayMsec = 500;
  67 static const int kSyncSchedulerDelayMsec = 250;
  68
  69 GetUpdatesCallerInfo::GetUpdatesSource GetSourceFromReason(
  70     ConfigureReason reason) {
  71   switch (reason) {
  72     case CONFIGURE_REASON_RECONFIGURATION:
  73       return GetUpdatesCallerInfo::RECONFIGURATION;
  74     case CONFIGURE_REASON_MIGRATION:
  75       return GetUpdatesCallerInfo::MIGRATION;
  76     case CONFIGURE_REASON_NEW_CLIENT:
  77       return GetUpdatesCallerInfo::NEW_CLIENT;
  78     case CONFIGURE_REASON_NEWLY_ENABLED_DATA_TYPE:
  79     case CONFIGURE_REASON_CRYPTO:
  80       return GetUpdatesCallerInfo::NEWLY_SUPPORTED_DATATYPE;
  81     default:
  82       NOTREACHED();
  83   }
  84   return GetUpdatesCallerInfo::UNKNOWN;
  85 }
  86
  87 }  // namespace
  88
  89 // A class to calculate nudge delays for types.
  90 class NudgeStrategy {
  91  public:
  92   static TimeDelta GetNudgeDelayTimeDelta(const ModelType& model_type,
  93                                           SyncManagerImpl* core) {
  94     NudgeDelayStrategy delay_type = GetNudgeDelayStrategy(model_type);
  95     return GetNudgeDelayTimeDeltaFromType(delay_type,
  96                                           model_type,
  97                                           core);
  98   }
  99
 100  private:
 101   // Possible types of nudge delay for datatypes.
 102   // Note: These are just hints. If a sync happens then all dirty entries
 103   // would be committed as part of the sync.
 104   enum NudgeDelayStrategy {
 105     // Sync right away.
 106     IMMEDIATE,
 107
 108     // Sync this change while syncing another change.
 109     ACCOMPANY_ONLY,
 110
 111     // The datatype does not use one of the predefined wait times but defines
 112     // its own wait time logic for nudge.
 113     CUSTOM,
 114   };
 115
 116   static NudgeDelayStrategy GetNudgeDelayStrategy(const ModelType& type) {
 117     switch (type) {
 118      case AUTOFILL:
 119        return ACCOMPANY_ONLY;
 120      case PREFERENCES:
 121      case SESSIONS:
 122      case FAVICON_IMAGES:
 123      case FAVICON_TRACKING:
 124        return CUSTOM;
 125      default:
 126        return IMMEDIATE;
 127     }
 128   }
 129
 130   static TimeDelta GetNudgeDelayTimeDeltaFromType(
 131       const NudgeDelayStrategy& delay_type, const ModelType& model_type,
 132       const SyncManagerImpl* core) {
 133     CHECK(core);
 134     TimeDelta delay = TimeDelta::FromMilliseconds(
 135        kDefaultNudgeDelayMilliseconds);
 136     switch (delay_type) {
 137      case IMMEDIATE:
 138        delay = TimeDelta::FromMilliseconds(
 139            kDefaultNudgeDelayMilliseconds);
 140        break;
 141      case ACCOMPANY_ONLY:
 142        delay = TimeDelta::FromSeconds(kDefaultShortPollIntervalSeconds);
 143        break;
 144      case CUSTOM:
 145        switch (model_type) {
 146          case PREFERENCES:
 147            delay = TimeDelta::FromMilliseconds(
 148                kPreferencesNudgeDelayMilliseconds);
 149            break;
 150          case SESSIONS:
 151          case FAVICON_IMAGES:
 152          case FAVICON_TRACKING:
 153            delay = core->scheduler()->GetSessionsCommitDelay();
 154            break;
 155          default:
 156            NOTREACHED();
 157        }
 158        break;
 159      default:
 160        NOTREACHED();
 161     }
 162     return delay;
 163   }
 164 };
 165
 166 SyncManagerImpl::SyncManagerImpl(const std::string& name)
 167     : name_(name),
 168       change_delegate_(NULL),
 169       initialized_(false),
 170       observing_network_connectivity_changes_(false),
 171       invalidator_state_(DEFAULT_INVALIDATION_ERROR),
 172       report_unrecoverable_error_function_(NULL),
 173       weak_ptr_factory_(this) {
 174   // Pre-fill |notification_info_map_|.
 175   for (int i = FIRST_REAL_MODEL_TYPE; i < MODEL_TYPE_COUNT; ++i) {
 176     notification_info_map_.insert(
 177         std::make_pair(ModelTypeFromInt(i), NotificationInfo()));
 178   }
 179 }
 180
 181 SyncManagerImpl::~SyncManagerImpl() {
 182   DCHECK(thread_checker_.CalledOnValidThread());
 183   CHECK(!initialized_);
 184 }
 185
 186 SyncManagerImpl::NotificationInfo::NotificationInfo() : total_count(0) {}
 187 SyncManagerImpl::NotificationInfo::~NotificationInfo() {}
 188
 189 base::DictionaryValue* SyncManagerImpl::NotificationInfo::ToValue() const {
 190   base::DictionaryValue* value = new base::DictionaryValue();
 191   value->SetInteger("totalCount", total_count);
 192   value->SetString("payload", payload);
 193   return value;
 194 }
 195
 196 bool SyncManagerImpl::VisiblePositionsDiffer(
 197     const syncable::EntryKernelMutation& mutation) const {
 198   const syncable::EntryKernel& a = mutation.original;
 199   const syncable::EntryKernel& b = mutation.mutated;
 200   if (!b.ShouldMaintainPosition())
 201     return false;
 202   if (!a.ref(UNIQUE_POSITION).Equals(b.ref(UNIQUE_POSITION)))
 203     return true;
 204   if (a.ref(syncable::PARENT_ID) != b.ref(syncable::PARENT_ID))
 205     return true;
 206   return false;
 207 }
 208
 209 bool SyncManagerImpl::VisiblePropertiesDiffer(
 210     const syncable::EntryKernelMutation& mutation,
 211     Cryptographer* cryptographer) const {
 212   const syncable::EntryKernel& a = mutation.original;
 213   const syncable::EntryKernel& b = mutation.mutated;
 214   const sync_pb::EntitySpecifics& a_specifics = a.ref(SPECIFICS);
 215   const sync_pb::EntitySpecifics& b_specifics = b.ref(SPECIFICS);
 216   DCHECK_EQ(GetModelTypeFromSpecifics(a_specifics),
 217             GetModelTypeFromSpecifics(b_specifics));
 218   ModelType model_type = GetModelTypeFromSpecifics(b_specifics);
 219   // Suppress updates to items that aren't tracked by any browser model.
 220   if (model_type < FIRST_REAL_MODEL_TYPE ||
 221       !a.ref(syncable::UNIQUE_SERVER_TAG).empty()) {
 222     return false;
 223   }
 224   if (a.ref(syncable::IS_DIR) != b.ref(syncable::IS_DIR))
 225     return true;
 226   if (!AreSpecificsEqual(cryptographer,
 227                          a.ref(syncable::SPECIFICS),
 228                          b.ref(syncable::SPECIFICS))) {
 229     return true;
 230   }
 231   // We only care if the name has changed if neither specifics is encrypted
 232   // (encrypted nodes blow away the NON_UNIQUE_NAME).
 233   if (!a_specifics.has_encrypted() && !b_specifics.has_encrypted() &&
 234       a.ref(syncable::NON_UNIQUE_NAME) != b.ref(syncable::NON_UNIQUE_NAME))
 235     return true;
 236   if (VisiblePositionsDiffer(mutation))
 237     return true;
 238   return false;
 239 }
 240
 241 ModelTypeSet SyncManagerImpl::InitialSyncEndedTypes() {
 242   return directory()->InitialSyncEndedTypes();
 243 }
 244
 245 ModelTypeSet SyncManagerImpl::GetTypesWithEmptyProgressMarkerToken(
 246     ModelTypeSet types) {
 247   ModelTypeSet result;
 248   for (ModelTypeSet::Iterator i = types.First(); i.Good(); i.Inc()) {
 249     sync_pb::DataTypeProgressMarker marker;
 250     directory()->GetDownloadProgress(i.Get(), &marker);
 251
 252     if (marker.token().empty())
 253       result.Put(i.Get());
 254   }
 255   return result;
 256 }
 257
 258 void SyncManagerImpl::ConfigureSyncer(
 259     ConfigureReason reason,
 260     ModelTypeSet to_download,
 261     ModelTypeSet to_purge,
 262     ModelTypeSet to_journal,
 263     ModelTypeSet to_unapply,
 264     const ModelSafeRoutingInfo& new_routing_info,
 265     const base::Closure& ready_task,
 266     const base::Closure& retry_task) {
 267   DCHECK(thread_checker_.CalledOnValidThread());
 268   DCHECK(!ready_task.is_null());
 269   DCHECK(!retry_task.is_null());
 270
 271   DVLOG(1) << "Configuring -"
 272            << "\n\t" << "current types: "
 273            << ModelTypeSetToString(GetRoutingInfoTypes(new_routing_info))
 274            << "\n\t" << "types to download: "
 275            << ModelTypeSetToString(to_download)
 276            << "\n\t" << "types to purge: "
 277            << ModelTypeSetToString(to_purge)
 278            << "\n\t" << "types to journal: "
 279            << ModelTypeSetToString(to_journal)
 280            << "\n\t" << "types to unapply: "
 281            << ModelTypeSetToString(to_unapply);
 282   if (!PurgeDisabledTypes(to_purge,
 283                           to_journal,
 284                           to_unapply)) {
 285     // We failed to cleanup the types. Invoke the ready task without actually
 286     // configuring any types. The caller should detect this as a configuration
 287     // failure and act appropriately.
 288     ready_task.Run();
 289     return;
 290   }
 291
 292   ConfigurationParams params(GetSourceFromReason(reason),
 293                              to_download,
 294                              new_routing_info,
 295                              ready_task,
 296                              retry_task);
 297
 298   scheduler_->Start(SyncScheduler::CONFIGURATION_MODE);
 299   scheduler_->ScheduleConfiguration(params);
 300 }
 301
 302 void SyncManagerImpl::Init(
 303     const base::FilePath& database_location,
 304     const WeakHandle<JsEventHandler>& event_handler,
 305     const std::string& sync_server_and_path,
 306     int port,
 307     bool use_ssl,
 308     scoped_ptr<HttpPostProviderFactory> post_factory,
 309     const std::vector<scoped_refptr<ModelSafeWorker> >& workers,
 310     ExtensionsActivity* extensions_activity,
 311     SyncManager::ChangeDelegate* change_delegate,
 312     const SyncCredentials& credentials,
 313     const std::string& invalidator_client_id,
 314     const std::string& restored_key_for_bootstrapping,
 315     const std::string& restored_keystore_key_for_bootstrapping,
 316     InternalComponentsFactory* internal_components_factory,
 317     Encryptor* encryptor,
 318     scoped_ptr<UnrecoverableErrorHandler> unrecoverable_error_handler,
 319     ReportUnrecoverableErrorFunction report_unrecoverable_error_function,
 320     CancelationSignal* cancelation_signal) {
 321   CHECK(!initialized_);
 322   DCHECK(thread_checker_.CalledOnValidThread());
 323   DCHECK(post_factory.get());
 324   DCHECK(!credentials.email.empty());
 325   DCHECK(!credentials.sync_token.empty());
 326   DCHECK(cancelation_signal);
 327   DVLOG(1) << "SyncManager starting Init...";
 328
 329   weak_handle_this_ = MakeWeakHandle(weak_ptr_factory_.GetWeakPtr());
 330
 331   change_delegate_ = change_delegate;
 332
 333   AddObserver(&js_sync_manager_observer_);
 334   SetJsEventHandler(event_handler);
 335
 336   AddObserver(&debug_info_event_listener_);
 337
 338   database_path_ = database_location.Append(
 339       syncable::Directory::kSyncDatabaseFilename);
 340   unrecoverable_error_handler_ = unrecoverable_error_handler.Pass();
 341   report_unrecoverable_error_function_ = report_unrecoverable_error_function;
 342
 343   allstatus_.SetHasKeystoreKey(
 344       !restored_keystore_key_for_bootstrapping.empty());
 345   sync_encryption_handler_.reset(new SyncEncryptionHandlerImpl(
 346       &share_,
 347       encryptor,
 348       restored_key_for_bootstrapping,
 349       restored_keystore_key_for_bootstrapping));
 350   sync_encryption_handler_->AddObserver(this);
 351   sync_encryption_handler_->AddObserver(&debug_info_event_listener_);
 352   sync_encryption_handler_->AddObserver(&js_sync_encryption_handler_observer_);
 353
 354   base::FilePath absolute_db_path = database_path_;
 355   DCHECK(absolute_db_path.IsAbsolute());
 356
 357   scoped_ptr<syncable::DirectoryBackingStore> backing_store =
 358       internal_components_factory->BuildDirectoryBackingStore(
 359           credentials.email, absolute_db_path).Pass();
 360
 361   DCHECK(backing_store.get());
 362   const std::string& username = credentials.email;
 363   share_.directory.reset(
 364       new syncable::Directory(
 365           backing_store.release(),
 366           unrecoverable_error_handler_.get(),
 367           report_unrecoverable_error_function_,
 368           sync_encryption_handler_.get(),
 369           sync_encryption_handler_->GetCryptographerUnsafe()));
 370
 371   DVLOG(1) << "Username: " << username;
 372   if (!OpenDirectory(username)) {
 373     NotifyInitializationFailure();
 374     LOG(ERROR) << "Sync manager initialization failed!";
 375     return;
 376   }
 377
 378   connection_manager_.reset(new SyncAPIServerConnectionManager(
 379       sync_server_and_path, port, use_ssl,
 380       post_factory.release(), cancelation_signal));
 381   connection_manager_->set_client_id(directory()->cache_guid());
 382   connection_manager_->AddListener(this);
 383
 384   std::string sync_id = directory()->cache_guid();
 385
 386   DVLOG(1) << "Setting sync client ID: " << sync_id;
 387   allstatus_.SetSyncId(sync_id);
 388   DVLOG(1) << "Setting invalidator client ID: " << invalidator_client_id;
 389   allstatus_.SetInvalidatorClientId(invalidator_client_id);
 390
 391   model_type_registry_.reset(new ModelTypeRegistry(workers, directory()));
 392
 393   sync_core_.reset(new SyncCore(model_type_registry_.get()));
 394
 395   // Bind the SyncCore WeakPtr to this thread.  This helps us crash earlier if
 396   // the pointer is misused in debug mode.
 397   base::WeakPtr<SyncCore> weak_core = sync_core_->AsWeakPtr();
 398   weak_core.get();
 399
 400   sync_core_proxy_.reset(
 401       new SyncCoreProxyImpl(base::MessageLoopProxy::current(), weak_core));
 402
 403   // Build a SyncSessionContext and store the worker in it.
 404   DVLOG(1) << "Sync is bringing up SyncSessionContext.";
 405   std::vector<SyncEngineEventListener*> listeners;
 406   listeners.push_back(&allstatus_);
 407   listeners.push_back(this);
 408   session_context_ = internal_components_factory->BuildContext(
 409       connection_manager_.get(),
 410       directory(),
 411       extensions_activity,
 412       listeners,
 413       &debug_info_event_listener_,
 414       model_type_registry_.get(),
 415       invalidator_client_id).Pass();
 416   session_context_->set_account_name(credentials.email);
 417   scheduler_ = internal_components_factory->BuildScheduler(
 418       name_, session_context_.get(), cancelation_signal).Pass();
 419
 420   scheduler_->Start(SyncScheduler::CONFIGURATION_MODE);
 421
 422   initialized_ = true;
 423
 424   net::NetworkChangeNotifier::AddIPAddressObserver(this);
 425   net::NetworkChangeNotifier::AddConnectionTypeObserver(this);
 426   observing_network_connectivity_changes_ = true;
 427
 428   UpdateCredentials(credentials);
 429
 430   NotifyInitializationSuccess();
 431 }
 432
 433 void SyncManagerImpl::NotifyInitializationSuccess() {
 434   FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 435                     OnInitializationComplete(
 436                         MakeWeakHandle(weak_ptr_factory_.GetWeakPtr()),
 437                         MakeWeakHandle(debug_info_event_listener_.GetWeakPtr()),
 438                         true, InitialSyncEndedTypes()));
 439 }
 440
 441 void SyncManagerImpl::NotifyInitializationFailure() {
 442   FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 443                     OnInitializationComplete(
 444                         MakeWeakHandle(weak_ptr_factory_.GetWeakPtr()),
 445                         MakeWeakHandle(debug_info_event_listener_.GetWeakPtr()),
 446                         false, ModelTypeSet()));
 447 }
 448
 449 void SyncManagerImpl::OnPassphraseRequired(
 450     PassphraseRequiredReason reason,
 451     const sync_pb::EncryptedData& pending_keys) {
 452   // Does nothing.
 453 }
 454
 455 void SyncManagerImpl::OnPassphraseAccepted() {
 456   // Does nothing.
 457 }
 458
 459 void SyncManagerImpl::OnBootstrapTokenUpdated(
 460     const std::string& bootstrap_token,
 461     BootstrapTokenType type) {
 462   if (type == KEYSTORE_BOOTSTRAP_TOKEN)
 463     allstatus_.SetHasKeystoreKey(true);
 464 }
 465
 466 void SyncManagerImpl::OnEncryptedTypesChanged(ModelTypeSet encrypted_types,
 467                                               bool encrypt_everything) {
 468   allstatus_.SetEncryptedTypes(encrypted_types);
 469 }
 470
 471 void SyncManagerImpl::OnEncryptionComplete() {
 472   // Does nothing.
 473 }
 474
 475 void SyncManagerImpl::OnCryptographerStateChanged(
 476     Cryptographer* cryptographer) {
 477   allstatus_.SetCryptographerReady(cryptographer->is_ready());
 478   allstatus_.SetCryptoHasPendingKeys(cryptographer->has_pending_keys());
 479   allstatus_.SetKeystoreMigrationTime(
 480       sync_encryption_handler_->migration_time());
 481 }
 482
 483 void SyncManagerImpl::OnPassphraseTypeChanged(
 484     PassphraseType type,
 485     base::Time explicit_passphrase_time) {
 486   allstatus_.SetPassphraseType(type);
 487   allstatus_.SetKeystoreMigrationTime(
 488       sync_encryption_handler_->migration_time());
 489 }
 490
 491 void SyncManagerImpl::StartSyncingNormally(
 492     const ModelSafeRoutingInfo& routing_info) {
 493   // Start the sync scheduler.
 494   // TODO(sync): We always want the newest set of routes when we switch back
 495   // to normal mode. Figure out how to enforce set_routing_info is always
 496   // appropriately set and that it's only modified when switching to normal
 497   // mode.
 498   DCHECK(thread_checker_.CalledOnValidThread());
 499   session_context_->SetRoutingInfo(routing_info);
 500   scheduler_->Start(SyncScheduler::NORMAL_MODE);
 501 }
 502
 503 syncable::Directory* SyncManagerImpl::directory() {
 504   return share_.directory.get();
 505 }
 506
 507 const SyncScheduler* SyncManagerImpl::scheduler() const {
 508   return scheduler_.get();
 509 }
 510
 511 bool SyncManagerImpl::GetHasInvalidAuthTokenForTest() const {
 512   return connection_manager_->HasInvalidAuthToken();
 513 }
 514
 515 bool SyncManagerImpl::OpenDirectory(const std::string& username) {
 516   DCHECK(!initialized_) << "Should only happen once";
 517
 518   // Set before Open().
 519   change_observer_ = MakeWeakHandle(js_mutation_event_observer_.AsWeakPtr());
 520   WeakHandle<syncable::TransactionObserver> transaction_observer(
 521       MakeWeakHandle(js_mutation_event_observer_.AsWeakPtr()));
 522
 523   syncable::DirOpenResult open_result = syncable::NOT_INITIALIZED;
 524   open_result = directory()->Open(username, this, transaction_observer);
 525   if (open_result != syncable::OPENED) {
 526     LOG(ERROR) << "Could not open share for:" << username;
 527     return false;
 528   }
 529
 530   // Unapplied datatypes (those that do not have initial sync ended set) get
 531   // re-downloaded during any configuration. But, it's possible for a datatype
 532   // to have a progress marker but not have initial sync ended yet, making
 533   // it a candidate for migration. This is a problem, as the DataTypeManager
 534   // does not support a migration while it's already in the middle of a
 535   // configuration. As a result, any partially synced datatype can stall the
 536   // DTM, waiting for the configuration to complete, which it never will due
 537   // to the migration error. In addition, a partially synced nigori will
 538   // trigger the migration logic before the backend is initialized, resulting
 539   // in crashes. We therefore detect and purge any partially synced types as
 540   // part of initialization.
 541   if (!PurgePartiallySyncedTypes())
 542     return false;
 543
 544   return true;
 545 }
 546
 547 bool SyncManagerImpl::PurgePartiallySyncedTypes() {
 548   ModelTypeSet partially_synced_types = ModelTypeSet::All();
 549   partially_synced_types.RemoveAll(InitialSyncEndedTypes());
 550   partially_synced_types.RemoveAll(GetTypesWithEmptyProgressMarkerToken(
 551       ModelTypeSet::All()));
 552
 553   DVLOG(1) << "Purging partially synced types "
 554            << ModelTypeSetToString(partially_synced_types);
 555   UMA_HISTOGRAM_COUNTS("Sync.PartiallySyncedTypes",
 556                        partially_synced_types.Size());
 557   if (partially_synced_types.Empty())
 558     return true;
 559   return directory()->PurgeEntriesWithTypeIn(partially_synced_types,
 560                                              ModelTypeSet(),
 561                                              ModelTypeSet());
 562 }
 563
 564 bool SyncManagerImpl::PurgeDisabledTypes(
 565     ModelTypeSet to_purge,
 566     ModelTypeSet to_journal,
 567     ModelTypeSet to_unapply) {
 568   if (to_purge.Empty())
 569     return true;
 570   DVLOG(1) << "Purging disabled types " << ModelTypeSetToString(to_purge);
 571   DCHECK(to_purge.HasAll(to_journal));
 572   DCHECK(to_purge.HasAll(to_unapply));
 573   return directory()->PurgeEntriesWithTypeIn(to_purge, to_journal, to_unapply);
 574 }
 575
 576 void SyncManagerImpl::UpdateCredentials(const SyncCredentials& credentials) {
 577   DCHECK(thread_checker_.CalledOnValidThread());
 578   DCHECK(initialized_);
 579   DCHECK(!credentials.email.empty());
 580   DCHECK(!credentials.sync_token.empty());
 581
 582   observing_network_connectivity_changes_ = true;
 583   if (!connection_manager_->SetAuthToken(credentials.sync_token))
 584     return;  // Auth token is known to be invalid, so exit early.
 585
 586   scheduler_->OnCredentialsUpdated();
 587
 588   // TODO(zea): pass the credential age to the debug info event listener.
 589 }
 590
 591 void SyncManagerImpl::AddObserver(SyncManager::Observer* observer) {
 592   DCHECK(thread_checker_.CalledOnValidThread());
 593   observers_.AddObserver(observer);
 594 }
 595
 596 void SyncManagerImpl::RemoveObserver(SyncManager::Observer* observer) {
 597   DCHECK(thread_checker_.CalledOnValidThread());
 598   observers_.RemoveObserver(observer);
 599 }
 600
 601 void SyncManagerImpl::ShutdownOnSyncThread() {
 602   DCHECK(thread_checker_.CalledOnValidThread());
 603
 604   // Prevent any in-flight method calls from running.  Also
 605   // invalidates |weak_handle_this_| and |change_observer_|.
 606   weak_ptr_factory_.InvalidateWeakPtrs();
 607   js_mutation_event_observer_.InvalidateWeakPtrs();
 608
 609   scheduler_.reset();
 610   session_context_.reset();
 611   model_type_registry_.reset();
 612
 613   if (sync_encryption_handler_) {
 614     sync_encryption_handler_->RemoveObserver(&debug_info_event_listener_);
 615     sync_encryption_handler_->RemoveObserver(this);
 616   }
 617
 618   SetJsEventHandler(WeakHandle<JsEventHandler>());
 619   RemoveObserver(&js_sync_manager_observer_);
 620
 621   RemoveObserver(&debug_info_event_listener_);
 622
 623   // |connection_manager_| may end up being NULL here in tests (in synchronous
 624   // initialization mode).
 625   //
 626   // TODO(akalin): Fix this behavior.
 627   if (connection_manager_)
 628     connection_manager_->RemoveListener(this);
 629   connection_manager_.reset();
 630
 631   net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
 632   net::NetworkChangeNotifier::RemoveConnectionTypeObserver(this);
 633   observing_network_connectivity_changes_ = false;
 634
 635   if (initialized_ && directory()) {
 636     directory()->SaveChanges();
 637   }
 638
 639   share_.directory.reset();
 640
 641   change_delegate_ = NULL;
 642
 643   initialized_ = false;
 644
 645   // We reset these here, since only now we know they will not be
 646   // accessed from other threads (since we shut down everything).
 647   change_observer_.Reset();
 648   weak_handle_this_.Reset();
 649 }
 650
 651 void SyncManagerImpl::OnIPAddressChanged() {
 652   if (!observing_network_connectivity_changes_) {
 653     DVLOG(1) << "IP address change dropped.";
 654     return;
 655   }
 656   DVLOG(1) << "IP address change detected.";
 657   OnNetworkConnectivityChangedImpl();
 658 }
 659
 660 void SyncManagerImpl::OnConnectionTypeChanged(
 661   net::NetworkChangeNotifier::ConnectionType) {
 662   if (!observing_network_connectivity_changes_) {
 663     DVLOG(1) << "Connection type change dropped.";
 664     return;
 665   }
 666   DVLOG(1) << "Connection type change detected.";
 667   OnNetworkConnectivityChangedImpl();
 668 }
 669
 670 void SyncManagerImpl::OnNetworkConnectivityChangedImpl() {
 671   DCHECK(thread_checker_.CalledOnValidThread());
 672   scheduler_->OnConnectionStatusChange();
 673 }
 674
 675 void SyncManagerImpl::OnServerConnectionEvent(
 676     const ServerConnectionEvent& event) {
 677   DCHECK(thread_checker_.CalledOnValidThread());
 678   if (event.connection_code ==
 679       HttpResponse::SERVER_CONNECTION_OK) {
 680     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 681                       OnConnectionStatusChange(CONNECTION_OK));
 682   }
 683
 684   if (event.connection_code == HttpResponse::SYNC_AUTH_ERROR) {
 685     observing_network_connectivity_changes_ = false;
 686     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 687                       OnConnectionStatusChange(CONNECTION_AUTH_ERROR));
 688   }
 689
 690   if (event.connection_code == HttpResponse::SYNC_SERVER_ERROR) {
 691     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 692                       OnConnectionStatusChange(CONNECTION_SERVER_ERROR));
 693   }
 694 }
 695
 696 void SyncManagerImpl::HandleTransactionCompleteChangeEvent(
 697     ModelTypeSet models_with_changes) {
 698   // This notification happens immediately after the transaction mutex is
 699   // released. This allows work to be performed without blocking other threads
 700   // from acquiring a transaction.
 701   if (!change_delegate_)
 702     return;
 703
 704   // Call commit.
 705   for (ModelTypeSet::Iterator it = models_with_changes.First();
 706        it.Good(); it.Inc()) {
 707     change_delegate_->OnChangesComplete(it.Get());
 708     change_observer_.Call(
 709         FROM_HERE,
 710         &SyncManager::ChangeObserver::OnChangesComplete,
 711         it.Get());
 712   }
 713 }
 714
 715 ModelTypeSet
 716 SyncManagerImpl::HandleTransactionEndingChangeEvent(
 717     const ImmutableWriteTransactionInfo& write_transaction_info,
 718     syncable::BaseTransaction* trans) {
 719   // This notification happens immediately before a syncable WriteTransaction
 720   // falls out of scope. It happens while the channel mutex is still held,
 721   // and while the transaction mutex is held, so it cannot be re-entrant.
 722   if (!change_delegate_ || change_records_.empty())
 723     return ModelTypeSet();
 724
 725   // This will continue the WriteTransaction using a read only wrapper.
 726   // This is the last chance for read to occur in the WriteTransaction
 727   // that's closing. This special ReadTransaction will not close the
 728   // underlying transaction.
 729   ReadTransaction read_trans(GetUserShare(), trans);
 730
 731   ModelTypeSet models_with_changes;
 732   for (ChangeRecordMap::const_iterator it = change_records_.begin();
 733       it != change_records_.end(); ++it) {
 734     DCHECK(!it->second.Get().empty());
 735     ModelType type = ModelTypeFromInt(it->first);
 736     change_delegate_->
 737         OnChangesApplied(type, trans->directory()->GetTransactionVersion(type),
 738                          &read_trans, it->second);
 739     change_observer_.Call(FROM_HERE,
 740         &SyncManager::ChangeObserver::OnChangesApplied,
 741         type, write_transaction_info.Get().id, it->second);
 742     models_with_changes.Put(type);
 743   }
 744   change_records_.clear();
 745   return models_with_changes;
 746 }
 747
 748 void SyncManagerImpl::HandleCalculateChangesChangeEventFromSyncApi(
 749     const ImmutableWriteTransactionInfo& write_transaction_info,
 750     syncable::BaseTransaction* trans,
 751     std::vector<int64>* entries_changed) {
 752   // We have been notified about a user action changing a sync model.
 753   LOG_IF(WARNING, !change_records_.empty()) <<
 754       "CALCULATE_CHANGES called with unapplied old changes.";
 755
 756   // The mutated model type, or UNSPECIFIED if nothing was mutated.
 757   ModelTypeSet mutated_model_types;
 758
 759   const syncable::ImmutableEntryKernelMutationMap& mutations =
 760       write_transaction_info.Get().mutations;
 761   for (syncable::EntryKernelMutationMap::const_iterator it =
 762            mutations.Get().begin(); it != mutations.Get().end(); ++it) {
 763     if (!it->second.mutated.ref(syncable::IS_UNSYNCED)) {
 764       continue;
 765     }
 766
 767     ModelType model_type =
 768         GetModelTypeFromSpecifics(it->second.mutated.ref(SPECIFICS));
 769     if (model_type < FIRST_REAL_MODEL_TYPE) {
 770       NOTREACHED() << "Permanent or underspecified item changed via syncapi.";
 771       continue;
 772     }
 773
 774     // Found real mutation.
 775     if (model_type != UNSPECIFIED) {
 776       mutated_model_types.Put(model_type);
 777       entries_changed->push_back(it->second.mutated.ref(syncable::META_HANDLE));
 778     }
 779   }
 780
 781   // Nudge if necessary.
 782   if (!mutated_model_types.Empty()) {
 783     if (weak_handle_this_.IsInitialized()) {
 784       weak_handle_this_.Call(FROM_HERE,
 785                              &SyncManagerImpl::RequestNudgeForDataTypes,
 786                              FROM_HERE,
 787                              mutated_model_types);
 788     } else {
 789       NOTREACHED();
 790     }
 791   }
 792 }
 793
 794 void SyncManagerImpl::SetExtraChangeRecordData(int64 id,
 795     ModelType type, ChangeReorderBuffer* buffer,
 796     Cryptographer* cryptographer, const syncable::EntryKernel& original,
 797     bool existed_before, bool exists_now) {
 798   // If this is a deletion and the datatype was encrypted, we need to decrypt it
 799   // and attach it to the buffer.
 800   if (!exists_now && existed_before) {
 801     sync_pb::EntitySpecifics original_specifics(original.ref(SPECIFICS));
 802     if (type == PASSWORDS) {
 803       // Passwords must use their own legacy ExtraPasswordChangeRecordData.
 804       scoped_ptr<sync_pb::PasswordSpecificsData> data(
 805           DecryptPasswordSpecifics(original_specifics, cryptographer));
 806       if (!data) {
 807         NOTREACHED();
 808         return;
 809       }
 810       buffer->SetExtraDataForId(id, new ExtraPasswordChangeRecordData(*data));
 811     } else if (original_specifics.has_encrypted()) {
 812       // All other datatypes can just create a new unencrypted specifics and
 813       // attach it.
 814       const sync_pb::EncryptedData& encrypted = original_specifics.encrypted();
 815       if (!cryptographer->Decrypt(encrypted, &original_specifics)) {
 816         NOTREACHED();
 817         return;
 818       }
 819     }
 820     buffer->SetSpecificsForId(id, original_specifics);
 821   }
 822 }
 823
 824 void SyncManagerImpl::HandleCalculateChangesChangeEventFromSyncer(
 825     const ImmutableWriteTransactionInfo& write_transaction_info,
 826     syncable::BaseTransaction* trans,
 827     std::vector<int64>* entries_changed) {
 828   // We only expect one notification per sync step, so change_buffers_ should
 829   // contain no pending entries.
 830   LOG_IF(WARNING, !change_records_.empty()) <<
 831       "CALCULATE_CHANGES called with unapplied old changes.";
 832
 833   ChangeReorderBuffer change_buffers[MODEL_TYPE_COUNT];
 834
 835   Cryptographer* crypto = directory()->GetCryptographer(trans);
 836   const syncable::ImmutableEntryKernelMutationMap& mutations =
 837       write_transaction_info.Get().mutations;
 838   for (syncable::EntryKernelMutationMap::const_iterator it =
 839            mutations.Get().begin(); it != mutations.Get().end(); ++it) {
 840     bool existed_before = !it->second.original.ref(syncable::IS_DEL);
 841     bool exists_now = !it->second.mutated.ref(syncable::IS_DEL);
 842
 843     // Omit items that aren't associated with a model.
 844     ModelType type =
 845         GetModelTypeFromSpecifics(it->second.mutated.ref(SPECIFICS));
 846     if (type < FIRST_REAL_MODEL_TYPE)
 847       continue;
 848
 849     int64 handle = it->first;
 850     if (exists_now && !existed_before)
 851       change_buffers[type].PushAddedItem(handle);
 852     else if (!exists_now && existed_before)
 853       change_buffers[type].PushDeletedItem(handle);
 854     else if (exists_now && existed_before &&
 855              VisiblePropertiesDiffer(it->second, crypto)) {
 856       change_buffers[type].PushUpdatedItem(handle);
 857     }
 858
 859     SetExtraChangeRecordData(handle, type, &change_buffers[type], crypto,
 860                              it->second.original, existed_before, exists_now);
 861   }
 862
 863   ReadTransaction read_trans(GetUserShare(), trans);
 864   for (int i = FIRST_REAL_MODEL_TYPE; i < MODEL_TYPE_COUNT; ++i) {
 865     if (!change_buffers[i].IsEmpty()) {
 866       if (change_buffers[i].GetAllChangesInTreeOrder(&read_trans,
 867                                                      &(change_records_[i]))) {
 868         for (size_t j = 0; j < change_records_[i].Get().size(); ++j)
 869           entries_changed->push_back((change_records_[i].Get())[j].id);
 870       }
 871       if (change_records_[i].Get().empty())
 872         change_records_.erase(i);
 873     }
 874   }
 875 }
 876
 877 TimeDelta SyncManagerImpl::GetNudgeDelayTimeDelta(
 878     const ModelType& model_type) {
 879   return NudgeStrategy::GetNudgeDelayTimeDelta(model_type, this);
 880 }
 881
 882 void SyncManagerImpl::RequestNudgeForDataTypes(
 883     const tracked_objects::Location& nudge_location,
 884     ModelTypeSet types) {
 885   debug_info_event_listener_.OnNudgeFromDatatype(types.First().Get());
 886
 887   // TODO(lipalani) : Calculate the nudge delay based on all types.
 888   base::TimeDelta nudge_delay = NudgeStrategy::GetNudgeDelayTimeDelta(
 889       types.First().Get(),
 890       this);
 891   scheduler_->ScheduleLocalNudge(nudge_delay,
 892                                  types,
 893                                  nudge_location);
 894 }
 895
 896 void SyncManagerImpl::OnSyncCycleEvent(const SyncCycleEvent& event) {
 897   DCHECK(thread_checker_.CalledOnValidThread());
 898   // Only send an event if this is due to a cycle ending and this cycle
 899   // concludes a canonical "sync" process; that is, based on what is known
 900   // locally we are "all happy" and up-to-date.  There may be new changes on
 901   // the server, but we'll get them on a subsequent sync.
 902   //
 903   // Notifications are sent at the end of every sync cycle, regardless of
 904   // whether we should sync again.
 905   if (event.what_happened == SyncCycleEvent::SYNC_CYCLE_ENDED) {
 906     if (!initialized_) {
 907       DVLOG(1) << "OnSyncCycleCompleted not sent because sync api is not "
 908                << "initialized";
 909       return;
 910     }
 911
 912     DVLOG(1) << "Sending OnSyncCycleCompleted";
 913     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 914                       OnSyncCycleCompleted(event.snapshot));
 915   }
 916 }
 917
 918 void SyncManagerImpl::OnActionableError(const SyncProtocolError& error) {
 919   FOR_EACH_OBSERVER(
 920       SyncManager::Observer, observers_,
 921       OnActionableError(error));
 922 }
 923
 924 void SyncManagerImpl::OnRetryTimeChanged(base::Time) {}
 925
 926 void SyncManagerImpl::OnThrottledTypesChanged(ModelTypeSet) {}
 927
 928 void SyncManagerImpl::OnMigrationRequested(ModelTypeSet types) {
 929   FOR_EACH_OBSERVER(
 930       SyncManager::Observer, observers_,
 931       OnMigrationRequested(types));
 932 }
 933
 934 void SyncManagerImpl::OnProtocolEvent(const ProtocolEvent& event) {
 935   protocol_event_buffer_.RecordProtocolEvent(event);
 936   FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 937                     OnProtocolEvent(event));
 938 }
 939
 940 void SyncManagerImpl::SetJsEventHandler(
 941     const WeakHandle<JsEventHandler>& event_handler) {
 942   js_sync_manager_observer_.SetJsEventHandler(event_handler);
 943   js_mutation_event_observer_.SetJsEventHandler(event_handler);
 944   js_sync_encryption_handler_observer_.SetJsEventHandler(event_handler);
 945 }
 946
 947 scoped_ptr<base::ListValue> SyncManagerImpl::GetAllNodesForType(
 948     syncer::ModelType type) {
 949   DirectoryTypeDebugInfoEmitterMap* emitter_map =
 950       model_type_registry_->directory_type_debug_info_emitter_map();
 951   DirectoryTypeDebugInfoEmitterMap::iterator it = emitter_map->find(type);
 952
 953   if (it == emitter_map->end()) {
 954     // This can happen in some cases.  The UI thread makes requests of us
 955     // when it doesn't really know which types are enabled or disabled.
 956     DLOG(WARNING) << "Asked to return debug info for invalid type "
 957                   << ModelTypeToString(type);
 958     return scoped_ptr<base::ListValue>();
 959   }
 960
 961   return it->second->GetAllNodes();
 962 }
 963
 964 void SyncManagerImpl::OnInvalidatorStateChange(InvalidatorState state) {
 965   DCHECK(thread_checker_.CalledOnValidThread());
 966
 967   const std::string& state_str = InvalidatorStateToString(state);
 968   invalidator_state_ = state;
 969   DVLOG(1) << "Invalidator state changed to: " << state_str;
 970   const bool notifications_enabled =
 971       (invalidator_state_ == INVALIDATIONS_ENABLED);
 972   allstatus_.SetNotificationsEnabled(notifications_enabled);
 973   scheduler_->SetNotificationsEnabled(notifications_enabled);
 974 }
 975
 976 void SyncManagerImpl::OnIncomingInvalidation(
 977     const ObjectIdInvalidationMap& invalidation_map) {
 978   DCHECK(thread_checker_.CalledOnValidThread());
 979
 980   // We should never receive IDs from non-sync objects.
 981   ObjectIdSet ids = invalidation_map.GetObjectIds();
 982   for (ObjectIdSet::const_iterator it = ids.begin(); it != ids.end(); ++it) {
 983     ModelType type;
 984     if (!ObjectIdToRealModelType(*it, &type)) {
 985       DLOG(WARNING) << "Notification has invalid id: " << ObjectIdToString(*it);
 986     }
 987   }
 988
 989   if (invalidation_map.Empty()) {
 990     LOG(WARNING) << "Sync received invalidation without any type information.";
 991   } else {
 992     scheduler_->ScheduleInvalidationNudge(
 993         TimeDelta::FromMilliseconds(kSyncSchedulerDelayMsec),
 994         invalidation_map, FROM_HERE);
 995     debug_info_event_listener_.OnIncomingNotification(invalidation_map);
 996   }
 997 }
 998
 999 std::string SyncManagerImpl::GetOwnerName() const { return "SyncManagerImpl"; }
1000
1001 void SyncManagerImpl::RefreshTypes(ModelTypeSet types) {
1002   DCHECK(thread_checker_.CalledOnValidThread());
1003   if (types.Empty()) {
1004     LOG(WARNING) << "Sync received refresh request with no types specified.";
1005   } else {
1006     scheduler_->ScheduleLocalRefreshRequest(
1007         TimeDelta::FromMilliseconds(kSyncRefreshDelayMsec),
1008         types, FROM_HERE);
1009   }
1010 }
1011
1012 SyncStatus SyncManagerImpl::GetDetailedStatus() const {
1013   return allstatus_.status();
1014 }
1015
1016 void SyncManagerImpl::SaveChanges() {
1017   directory()->SaveChanges();
1018 }
1019
1020 UserShare* SyncManagerImpl::GetUserShare() {
1021   DCHECK(initialized_);
1022   return &share_;
1023 }
1024
1025 syncer::SyncCoreProxy* SyncManagerImpl::GetSyncCoreProxy() {
1026   DCHECK(initialized_);
1027   return sync_core_proxy_.get();
1028 }
1029
1030 const std::string SyncManagerImpl::cache_guid() {
1031   DCHECK(initialized_);
1032   return directory()->cache_guid();
1033 }
1034
1035 bool SyncManagerImpl::ReceivedExperiment(Experiments* experiments) {
1036   ReadTransaction trans(FROM_HERE, GetUserShare());
1037   ReadNode nigori_node(&trans);
1038   if (nigori_node.InitTypeRoot(NIGORI) != BaseNode::INIT_OK) {
1039     DVLOG(1) << "Couldn't find Nigori node.";
1040     return false;
1041   }
1042   bool found_experiment = false;
1043
1044   ReadNode favicon_sync_node(&trans);
1045   if (favicon_sync_node.InitByClientTagLookup(
1046           syncer::EXPERIMENTS,
1047           syncer::kFaviconSyncTag) == BaseNode::INIT_OK) {
1048     experiments->favicon_sync_limit =
1049         favicon_sync_node.GetExperimentsSpecifics().favicon_sync().
1050             favicon_sync_limit();
1051     found_experiment = true;
1052   }
1053
1054   ReadNode pre_commit_update_avoidance_node(&trans);
1055   if (pre_commit_update_avoidance_node.InitByClientTagLookup(
1056           syncer::EXPERIMENTS,
1057           syncer::kPreCommitUpdateAvoidanceTag) == BaseNode::INIT_OK) {
1058     session_context_->set_server_enabled_pre_commit_update_avoidance(
1059         pre_commit_update_avoidance_node.GetExperimentsSpecifics().
1060             pre_commit_update_avoidance().enabled());
1061     // We don't bother setting found_experiment.  The frontend doesn't need to
1062     // know about this.
1063   }
1064
1065   ReadNode gcm_channel_node(&trans);
1066   if (gcm_channel_node.InitByClientTagLookup(
1067           syncer::EXPERIMENTS,
1068           syncer::kGCMChannelTag) == BaseNode::INIT_OK &&
1069       gcm_channel_node.GetExperimentsSpecifics().gcm_channel().has_enabled()) {
1070     experiments->gcm_channel_state =
1071         (gcm_channel_node.GetExperimentsSpecifics().gcm_channel().enabled() ?
1072          syncer::Experiments::ENABLED : syncer::Experiments::SUPPRESSED);
1073     found_experiment = true;
1074   }
1075
1076   ReadNode enhanced_bookmarks_node(&trans);
1077   if (enhanced_bookmarks_node.InitByClientTagLookup(
1078           syncer::EXPERIMENTS, syncer::kEnhancedBookmarksTag) ==
1079           BaseNode::INIT_OK &&
1080       enhanced_bookmarks_node.GetExperimentsSpecifics()
1081           .has_enhanced_bookmarks()) {
1082     const sync_pb::EnhancedBookmarksFlags& enhanced_bookmarks =
1083         enhanced_bookmarks_node.GetExperimentsSpecifics().enhanced_bookmarks();
1084     if (enhanced_bookmarks.has_enabled())
1085       experiments->enhanced_bookmarks_enabled = enhanced_bookmarks.enabled();
1086     if (enhanced_bookmarks.has_extension_id()) {
1087       experiments->enhanced_bookmarks_ext_id =
1088           enhanced_bookmarks.extension_id();
1089     }
1090     found_experiment = true;
1091   }
1092
1093   ReadNode gcm_invalidations_node(&trans);
1094   if (gcm_invalidations_node.InitByClientTagLookup(
1095           syncer::EXPERIMENTS, syncer::kGCMInvalidationsTag) ==
1096       BaseNode::INIT_OK) {
1097     const sync_pb::GcmInvalidationsFlags& gcm_invalidations =
1098         gcm_invalidations_node.GetExperimentsSpecifics().gcm_invalidations();
1099     if (gcm_invalidations.has_enabled()) {
1100       experiments->gcm_invalidations_enabled = gcm_invalidations.enabled();
1101       found_experiment = true;
1102     }
1103   }
1104
1105   return found_experiment;
1106 }
1107
1108 bool SyncManagerImpl::HasUnsyncedItems() {
1109   ReadTransaction trans(FROM_HERE, GetUserShare());
1110   return (trans.GetWrappedTrans()->directory()->unsynced_entity_count() != 0);
1111 }
1112
1113 SyncEncryptionHandler* SyncManagerImpl::GetEncryptionHandler() {
1114   return sync_encryption_handler_.get();
1115 }
1116
1117 ScopedVector<syncer::ProtocolEvent>
1118     SyncManagerImpl::GetBufferedProtocolEvents() {
1119   return protocol_event_buffer_.GetBufferedProtocolEvents();
1120 }
1121
1122 void SyncManagerImpl::RegisterDirectoryTypeDebugInfoObserver(
1123     syncer::TypeDebugInfoObserver* observer) {
1124   model_type_registry_->RegisterDirectoryTypeDebugInfoObserver(observer);
1125 }
1126
1127 void SyncManagerImpl::UnregisterDirectoryTypeDebugInfoObserver(
1128     syncer::TypeDebugInfoObserver* observer) {
1129   model_type_registry_->UnregisterDirectoryTypeDebugInfoObserver(observer);
1130 }
1131
1132 bool SyncManagerImpl::HasDirectoryTypeDebugInfoObserver(
1133     syncer::TypeDebugInfoObserver* observer) {
1134   return model_type_registry_->HasDirectoryTypeDebugInfoObserver(observer);
1135 }
1136
1137 void SyncManagerImpl::RequestEmitDebugInfo() {
1138   model_type_registry_->RequestEmitDebugInfo();
1139 }
1140
1141 // static.
1142 int SyncManagerImpl::GetDefaultNudgeDelay() {
1143   return kDefaultNudgeDelayMilliseconds;
1144 }
1145
1146 // static.
1147 int SyncManagerImpl::GetPreferencesNudgeDelay() {
1148   return kPreferencesNudgeDelayMilliseconds;
1149 }
1150
1151 }  // namespace syncer