Patch 3 in the series.

WebCore/platform/gtk/AsyncFileSystemGtk.cpp

 /*
  * Copyright (C) 2012 ChangSeok Oh <shivamidow@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 100 matching lines @@
 {
     notImplemented();
 }
 
 
 void AsyncFileSystemGtk::createWriter(AsyncFileWriterClient* client, const KURL& path, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
 {
     notImplemented();
 }
 
+void AsyncFileSystemGtk::createSnapshotFileAndReadMetadata(const KURL&, PassOwnPtr<AsyncFileSystemCallbacks>)
+{
+    notImplemented();
+}
+
 } // namespace WebCore
 
 #endif