Add IPC plumbing code for FileSystem API's openFileSystem

chrome/common/webkit_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 contains ParamTraits templates to support serialization of WebKit
 // data types over IPC.
 //
 // NOTE: IT IS IMPORTANT THAT ONLY POD (plain old data) TYPES ARE SERIALIZED.
 //
 // There are several reasons for this restrictions:
@@ skipping 11 matching lines @@
 
 #ifndef CHROME_COMMON_WEBKIT_PARAM_TRAITS_H_
 #define CHROME_COMMON_WEBKIT_PARAM_TRAITS_H_
 #pragma once
 
 #include "ipc/ipc_message_utils.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebCache.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebConsoleMessage.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebContextMenuData.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebDragOperation.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebFileSystem.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebInputEvent.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebPopupType.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebTextDirection.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebTextInputType.h"
 
 namespace WebKit {
 struct WebCompositionUnderline;
 struct WebFindOptions;
 struct WebMediaPlayerAction;
 struct WebRect;
@@ skipping 278 matching lines @@
         break;
       default:
         NOTIMPLEMENTED();
         control = "UNKNOWN";
         break;
     }
     LogParam(control, l);
   }
 };
 
+template <>
+struct SimilarTypeTraits<WebKit::WebFileSystem::Type> {
+  typedef int Type;
+};
+
 }  // namespace IPC
 
 #endif  // CHROME_COMMON_WEBKIT_PARAM_TRAITS_H_