Put file_system messages in their own file and move them to content, in prepa...

content/common/common_param_traits.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.
 
 // 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 used by the content code, and which need
 // manual serialization code.  This is usually because they're not structs with
 // public members..
 
 #ifndef CONTENT_COMMON_COMMON_PARAM_TRAITS_H_
 #define CONTENT_COMMON_COMMON_PARAM_TRAITS_H_
 #pragma once
 
+#include "base/platform_file.h"
 #include "base/ref_counted.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message_utils.h"
 #include "net/url_request/url_request_status.h"
 // !!! WARNING: DO NOT ADD NEW WEBKIT DEPENDENCIES !!!
 //
 // That means don't add #includes to any file in 'webkit/' or
 // 'third_party/WebKit/'. Chrome Frame and NACL build parts of base/ and
 // content/common/ for a mini-library that doesn't depend on webkit.
 
@@ skipping 74 matching lines @@
 };
 
 template <>
 struct ParamTraits<scoped_refptr<webkit_glue::ResourceDevToolsInfo> > {
   typedef scoped_refptr<webkit_glue::ResourceDevToolsInfo> 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<base::PlatformFileInfo> {
+  typedef base::PlatformFileInfo 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 SimilarTypeTraits<base::PlatformFileError> {
+  typedef int Type;
+};
+
 }  // namespace IPC
 
 #endif  // CONTENT_COMMON_COMMON_PARAM_TRAITS_H_