[SyncFS] Add browser_tests to test authentication state of SyncFS

chrome/browser/sync_file_system/drive_backend/sync_engine.cc

 // 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.
 
 #include "chrome/browser/sync_file_system/drive_backend/sync_engine.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/metrics/histogram.h"
@@ skipping 695 matching lines @@
                    base::Unretained(sync_worker_.get()),
                    REMOTE_SERVICE_OK,
                    "Connected"));
   } else if (network_available_old && !network_available_) {
     worker_task_runner_->PostTask(
         FROM_HERE,
         base::Bind(&SyncWorkerInterface::DeactivateService,
                    base::Unretained(sync_worker_.get()),
                    "Disconnected"));
   }
-
 }
 
 void SyncEngine::GoogleSigninFailed(const GoogleServiceAuthError& error) {
   Reset();
   UpdateServiceState(REMOTE_SERVICE_AUTHENTICATION_REQUIRED,
                      "Failed to sign in.");
 }
 
 void SyncEngine::GoogleSigninSucceeded(const std::string& account_id,
                                        const std::string& username,
@@ skipping 11 matching lines @@
 SyncEngine::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)
     : ui_task_runner_(ui_task_runner),
       worker_task_runner_(worker_task_runner),
       drive_task_runner_(drive_task_runner),
       sync_file_system_dir_(sync_file_system_dir),
       task_logger_(task_logger),
       notification_manager_(notification_manager),
       extension_service_(extension_service),
       signin_manager_(signin_manager),
@@ skipping 43 matching lines @@
 
 SyncStatusCallback SyncEngine::TrackCallback(
     const SyncStatusCallback& callback) {
   return callback_tracker_.Register(
       base::Bind(callback, SYNC_STATUS_ABORT),
       callback);
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system