[SyncFS] Add browser_tests to test authentication state of SyncFS

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 27 matching lines @@
 class Env;
 }
 
 namespace net {
 class URLRequestContextGetter;
 }
 
 namespace sync_file_system {
 
 class RemoteChangeProcessor;
+class SyncFileSystemTest;
 
 namespace drive_backend {
 
 class DriveServiceWrapper;
 class DriveUploaderWrapper;
 class MetadataDatabase;
 class RemoteChangeProcessorOnWorker;
 class RemoteChangeProcessorWrapper;
 class SyncTaskManager;
 class SyncWorkerInterface;
@@ skipping 94 matching lines @@
                                      const std::string& username,
                                      const std::string& password) OVERRIDE;
   virtual void GoogleSignedOut(const std::string& account_id,
                                const std::string& username) OVERRIDE;
 
  private:
   class WorkerObserver;
 
   friend class DriveBackendSyncTest;
   friend class SyncEngineTest;
+  friend class sync_file_system::SyncFileSystemTest;
 
   SyncEngine(const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner,
              const scoped_refptr<base::SequencedTaskRunner>& worker_task_runner,
              const scoped_refptr<base::SequencedTaskRunner>& drive_task_runner,
              const base::FilePath& sync_file_system_dir,
              TaskLogger* task_logger,
              drive::DriveNotificationManager* notification_manager,
              ExtensionServiceInterface* extension_service,
              SigninManagerBase* signin_manager,
              OAuth2TokenService* token_service,
-             const scoped_refptr<net::URLRequestContextGetter>& request_context,
+             net::URLRequestContextGetter* request_context,
              scoped_ptr<DriveServiceFactory> drive_service_factory,
              leveldb::Env* env_override);
 
   // Called by WorkerObserver.
   void OnPendingFileListUpdated(int item_count);
   void OnFileStatusChanged(const storage::FileSystemURL& url,
                            SyncFileStatus file_status,
                            SyncAction sync_action,
                            SyncDirection direction);
   void UpdateServiceState(RemoteServiceState state,
@@ skipping 47 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_