[SyncFS] Construct and destruct sync_worker in worker_task_runner

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 49 matching lines @@
 
   static scoped_ptr<SyncEngine> CreateForBrowserContext(
       content::BrowserContext* context);
   static void AppendDependsOnFactories(
       std::set<BrowserContextKeyedServiceFactory*>* factories);
 
   virtual ~SyncEngine();
 
   void Initialize(const base::FilePath& base_dir,
                   base::SequencedTaskRunner* file_task_runner,
+                  const base::Closure& closure,
                   leveldb::Env* env_override);
 
   // RemoteFileSyncService overrides.
   virtual void AddServiceObserver(SyncServiceObserver* observer) OVERRIDE;
   virtual void AddFileStatusObserver(FileStatusObserver* observer) OVERRIDE;
   virtual void RegisterOrigin(
       const GURL& origin,
       const SyncStatusCallback& callback) OVERRIDE;
   virtual void EnableOrigin(
       const GURL& origin,
@@ skipping 57 matching lines @@
   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);
 
   void UpdateRegisteredApps();
+  void SetSyncWorker(const base::Closure& closure,
+                     scoped_ptr<SyncWorker> sync_worker);
 
   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 15 matching lines @@
   scoped_refptr<base::SequencedTaskRunner> worker_task_runner_;
 
   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_