Add RemoteFileSyncService interface

webkit/fileapi/syncable/sync_callbacks.h

 // Copyright (c) 2012 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 WEBKIT_FILEAPI_SYNCABLE_SYNC_CALLBACKS_H_
 #define WEBKIT_FILEAPI_SYNCABLE_SYNC_CALLBACKS_H_
 
 #include "base/callback_forward.h"
 #include "webkit/fileapi/syncable/sync_status_code.h"
 
 namespace fileapi {
 class FileSystemURL;
 
 typedef base::Callback<void(SyncStatusCode status)> StatusCallback;
 typedef base::Callback<void(SyncStatusCode, const FileSystemURL& url)>
     SyncCompletionCallback;
-}  // namespace sync_file_system
+}  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_SYNCABLE_SYNC_CALLBACKS_H_