Cleanup the IPC param traits structure

content/common/cc_messages.h

+// Copyright (c) 2012 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.
+//
+// IPC Messages sent between compositor instances.
+// Multiply-included message file, hence no include guard.
+
+#include "content/common/content_export.h"
+#include "ipc/ipc_message_macros.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebData.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebTransformationMatrix.h"
+
+#ifndef CONTENT_COMMON_CC_MESSAGES_H_
+#define CONTENT_COMMON_CC_MESSAGES_H_
+
+namespace IPC {
+
+template <>
+struct ParamTraits<WebKit::WebData> {
+  typedef WebKit::WebData param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, PickleIterator* iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<WebKit::WebTransformationMatrix> {
+  typedef WebKit::WebTransformationMatrix param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, PickleIterator* iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+}  // namespace IPC
+
+#endif  // CONTENT_COMMON_CC_MESSAGES_H_
+
+
+#define IPC_MESSAGE_START CCMsgStart
+#undef IPC_MESSAGE_EXPORT
+#define IPC_MESSAGE_EXPORT CONTENT_EXPORT