Cleanup: Remove unneeded forward declarations in webkit/.

webkit/fileapi/local_file_util.h

 // Copyright (c) 2011 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_LOCAL_FILE_UTIL_H_
 #define WEBKIT_FILEAPI_LOCAL_FILE_UTIL_H_
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/file_util_proxy.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/platform_file.h"
 #include "webkit/fileapi/file_system_file_util.h"
 #include "webkit/fileapi/file_system_types.h"
 
 namespace base {
 struct PlatformFileInfo;
-class MessageLoopProxy;
 class Time;
 }
 
 class GURL;
 
 namespace fileapi {
 
 using base::PlatformFile;
 using base::PlatformFileError;
 
@@ skipping 80 matching lines @@
       const GURL& origin_url,
       FileSystemType type,
       const FilePath& virtual_path);
 
   DISALLOW_COPY_AND_ASSIGN(LocalFileUtil);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_LOCAL_FILE_UTIL_H_