[SyncFS] SyncWorker cache refresh token status

chrome/browser/sync_file_system/drive_backend/drive_service_wrapper.h

 // Copyright 2014 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_DRIVE_SERVICE_WRAPPER_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_SERVICE_WRAPPER_H_
 
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/drive/drive_service_interface.h"
 
@@ skipping 42 matching lines @@
       const google_apis::FileListCallback& callback);
 
   void GetResourceEntry(
       const std::string& resource_id,
       const google_apis::GetResourceEntryCallback& callback);
 
   void GetFileListInDirectory(
       const std::string& directory_resource_id,
       const google_apis::FileListCallback& callback);
 
-  bool HasRefreshToken() const;
-
   void RemoveResourceFromDirectory(
       const std::string& parent_resource_id,
       const std::string& resource_id,
       const google_apis::EntryActionCallback& callback);
 
   void SearchByTitle(
       const std::string& title,
       const std::string& directory_resource_id,
       const google_apis::FileListCallback& callback);
 
  private:
   drive::DriveServiceInterface* drive_service_;
 
   DISALLOW_COPY_AND_ASSIGN(DriveServiceWrapper);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_SERVICE_WRAPPER_H_