[SyncFS] Create SyncWorkerTest

chrome/browser/sync_file_system/drive_backend/sync_engine.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 CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_ENGINE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_ENGINE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 126 matching lines @@
   friend class DriveBackendSyncTest;
   friend class SyncEngineTest;
 
   SyncEngine(scoped_ptr<drive::DriveServiceInterface> drive_service,
              scoped_ptr<drive::DriveUploaderInterface> drive_uploader,
              base::SequencedTaskRunner* worker_task_runner,
              drive::DriveNotificationManager* notification_manager,
              ExtensionServiceInterface* extension_service,
              SigninManagerBase* signin_manager);
 
-  // TODO(peria): Migrate this method into test code.
-  // This method is not thread safe, because it requires to access metadata
-  // database which may live in another thread.
-  void UpdateRegisteredAppsForTesting();
-
   SyncStatusCallback TrackCallback(const SyncStatusCallback& callback);
 
   scoped_ptr<drive::DriveServiceInterface> drive_service_;
   scoped_ptr<DriveServiceWrapper> drive_service_wrapper_;
   scoped_ptr<drive::DriveUploaderInterface> drive_uploader_;
   scoped_ptr<DriveUploaderWrapper> drive_uploader_wrapper_;
   RemoteChangeProcessor* remote_change_processor_;
   scoped_ptr<RemoteChangeProcessorWrapper> remote_change_processor_wrapper_;
 
   scoped_ptr<RemoteChangeProcessorOnWorker> remote_change_processor_on_worker_;
@@ skipping 18 matching lines @@
   CallbackTracker callback_tracker_;
 
   base::WeakPtrFactory<SyncEngine> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(SyncEngine);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_ENGINE_H_