chrome: Cleanup class/struct forward declarations

chrome/browser/media_galleries/fileapi/safe_picasa_album_table_reader.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_MEDIA_GALLERIES_FILEAPI_SAFE_PICASA_ALBUM_TABLE_READER_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_PICASA_ALBUM_TABLE_READER_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/common/media_galleries/picasa_types.h"
 #include "content/public/browser/utility_process_host.h"
 #include "content/public/browser/utility_process_host_client.h"
 
-namespace base {
-class FilePath;
-}
-
 namespace IPC {
 class Message;
 }
 
 namespace picasa {
 
 // SafePicasaAlbumTableReader parses the given Picasa PMP Album Table safely
 // via a utility process. The SafePicasaAlbumTableReader object is ref-counted
 // and kept alive after Start() is called until the ParserCallback is called.
 // The ParserCallback is guaranteed to be called eventually either when the
@@ skipping 46 matching lines @@
   // Verifies the messages from the utility process came at the right time.
   // Initialized on the Media Task Runner, but only accessed on the IO thread.
   ParserState parser_state_;
 
   DISALLOW_COPY_AND_ASSIGN(SafePicasaAlbumTableReader);
 };
 
 }  // namespace picasa
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_PICASA_ALBUM_TABLE_READER_H_