Add final part of IPC plumbing for FileSystem API

chrome/common/common_param_traits.h

 // Copyright (c) 2010 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.
 
 // This file is used to define IPC::ParamTraits<> specializations for a number
 // of types so that they can be serialized over IPC.  IPC::ParamTraits<>
 // specializations for basic types (like int and std::string) and types in the
 // 'base' project can be found in ipc/ipc_message_utils.h.  This file contains
 // specializations for types that are shared by more than one child process.
 
 #ifndef CHROME_COMMON_COMMON_PARAM_TRAITS_H_
 #define CHROME_COMMON_COMMON_PARAM_TRAITS_H_
 #pragma once
 
 #include <vector>
 
 #include "app/surface/transport_dib.h"
+#include "base/file_util.h"
 #include "base/ref_counted.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/page_zoom.h"
 #include "gfx/native_widget_types.h"
 #include "ipc/ipc_message_utils.h"
 #include "net/url_request/url_request_status.h"
 #include "printing/native_metafile.h"
 #include "webkit/glue/webcursor.h"
 #include "webkit/glue/window_open_disposition.h"
 
@@ skipping 277 matching lines @@
 };
 
 template <>
 struct ParamTraits<printing::NativeMetafile> {
   typedef printing::NativeMetafile param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m, void** iter, param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
+template <>
+struct ParamTraits<file_util::FileInfo> {
+  typedef file_util::FileInfo param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
 }  // namespace IPC
 
 #endif  // CHROME_COMMON_COMMON_PARAM_TRAITS_H_