[SyncFS] Expand simple functions to their caller in drive_backend/

chrome/browser/sync_file_system/drive_backend/folder_creator.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_FOLDER_CREATOR_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_FOLDER_CREATOR_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 32 matching lines @@
   void Run(const FileIDCallback& callback);
 
  private:
   void DidCreateFolder(const FileIDCallback& callback,
                        google_apis::GDataErrorCode error,
                        scoped_ptr<google_apis::FileResource> entry);
   void DidListFolders(const FileIDCallback& callback,
                       ScopedVector<google_apis::FileResource> candidates,
                       google_apis::GDataErrorCode error,
                       scoped_ptr<google_apis::FileList> file_list);
-  void DidUpdateDatabase(const std::string& file_id,
-                         const FileIDCallback& callback,
-                         SyncStatusCode status);
 
   drive::DriveServiceInterface* drive_service_;
   MetadataDatabase* metadata_database_;
 
   const std::string parent_folder_id_;
   const std::string title_;
 
   base::WeakPtrFactory<FolderCreator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FolderCreator);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_FOLDER_CREATOR_H_