[Sync] Move sync thread ownership to ProfileSyncService.

components/sync/driver/glue/sync_backend_host_mock.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_MOCK_H_
 #define COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_MOCK_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 10 matching lines @@
 // get through initialization.  It often returns null pointers or nonesense
 // values; it is not intended to be used in tests that depend on SyncBackendHost
 // behavior.
 class SyncBackendHostMock : public SyncBackendHost {
  public:
   SyncBackendHostMock();
   ~SyncBackendHostMock() override;
 
   void Initialize(
       SyncFrontend* frontend,
-      std::unique_ptr<base::Thread> sync_thread,
+      base::Thread* sync_thread,
       const scoped_refptr<base::SingleThreadTaskRunner>& db_thread,
       const scoped_refptr<base::SingleThreadTaskRunner>& file_thread,
       const WeakHandle<JsEventHandler>& event_handler,
       const GURL& service_url,
       const std::string& sync_user_agent,
       const SyncCredentials& credentials,
       bool delete_sync_data_folder,
       bool enable_local_sync_backend,
       const base::FilePath& local_sync_backend_folder,
       std::unique_ptr<SyncManagerFactory> sync_manager_factory,
       const WeakHandle<UnrecoverableErrorHandler>& unrecoverable_error_handler,
       const base::Closure& report_unrecoverable_error_function,
       const HttpPostProviderFactoryGetter& http_post_provider_factory_getter,
       std::unique_ptr<SyncEncryptionHandler::NigoriState> saved_nigori_state)
       override;
 
   void TriggerRefresh(const ModelTypeSet& types) override;
 
   void UpdateCredentials(const SyncCredentials& credentials) override;
 
   void StartSyncingWithServer() override;
 
   void SetEncryptionPassphrase(const std::string& passphrase,
                                bool is_explicit) override;
 
   bool SetDecryptionPassphrase(const std::string& passphrase) override;
 
   void StopSyncingForShutdown() override;
 
-  std::unique_ptr<base::Thread> Shutdown(ShutdownReason reason) override;
+  void Shutdown(ShutdownReason reason) override;
 
   void UnregisterInvalidationIds() override;
 
   ModelTypeSet ConfigureDataTypes(
       ConfigureReason reason,
       const DataTypeConfigStateMap& config_state_map,
       const base::Callback<void(ModelTypeSet, ModelTypeSet)>& ready_task,
       const base::Callback<void()>& retry_callback) override;
 
   void EnableEncryptEverything() override;
@@ skipping 26 matching lines @@
   void GetModelSafeRoutingInfo(ModelSafeRoutingInfo* out) const override;
 
   void FlushDirectory() const override;
 
   void RequestBufferedProtocolEventsAndEnableForwarding() override;
   void DisableProtocolEventForwarding() override;
 
   void EnableDirectoryTypeDebugInfoForwarding() override;
   void DisableDirectoryTypeDebugInfoForwarding() override;
 
-  base::MessageLoop* GetSyncLoopForTesting() override;
-
   void RefreshTypesForTest(ModelTypeSet types) override;
 
   void ClearServerData(
       const SyncManager::ClearServerDataCallback& callback) override;
 
   void OnCookieJarChanged(bool account_mismatch, bool empty_jar) override;
 
   void set_fail_initial_download(bool should_fail);
 
  private:
   bool fail_initial_download_;
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_MOCK_H_