New IPC definitions, only applied to async ROUTED and CONTROL messages.

ipc/ipc_message_utils_impl.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 templates forward declared (but not defined) in
+// ipc_message_utils.h so that they are only instantiated in certain files,
+// notably ipc_message_impl_macros.h and a few IPC unit tests.
+
+#ifndef IPC_IPC_MESSAGE_UTILS_IMPL_H_
+#define IPC_IPC_MESSAGE_UTILS_IMPL_H_
+
+namespace IPC {
+
+template <class ParamType>
+MessageWithTuple<ParamType>::MessageWithTuple(
+    int32 routing_id, uint32 type, const RefParam& p)
+    : Message(routing_id, type, PRIORITY_NORMAL) {
+  WriteParam(this, p);
+}
+
+template <class ParamType>
+bool MessageWithTuple<ParamType>::Read(const Message* msg, Param* p) {
+  void* iter = NULL;
+  if (ReadParam(msg, &iter, p))
+    return true;
+  NOTREACHED() << "Error deserializing message " << msg->type();
+  return false;
+}
+
+// We can't migrate the template for Log() to MessageWithTuple, because each
+// subclass needs to have Log() to call Read(), which instantiates the above
+// template.
+
+}  // namespace IPC
+
+#endif  // IPC_IPC_MESSAGE_UTILS_IMPL_H_