Reapplies all the IPC system work (reverts the revert r56272).

ipc/ipc_message_utils_impl.h

Index: ipc/ipc_message_utils_impl.h
diff --git a/ipc/ipc_message_utils_impl.h b/ipc/ipc_message_utils_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..715df8f498c971c0b663ef13195e512bfd33cfd4
--- /dev/null
+++ b/ipc/ipc_message_utils_impl.h
@@ -0,0 +1,60 @@
+// 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.
+
+template <class SendParamType, class ReplyParamType>
+MessageWithReply<SendParamType, ReplyParamType>::MessageWithReply(
+    int32 routing_id, uint32 type,
+    const RefSendParam& send,
+    const ReplyParam& reply)
+    : SyncMessage(routing_id, type, PRIORITY_NORMAL,
+                  new ParamDeserializer<ReplyParam>(reply)) {
+  WriteParam(this, send);
+}
+
+template <class SendParamType, class ReplyParamType>
+bool MessageWithReply<SendParamType, ReplyParamType>::ReadSendParam(
+    const Message* msg, SendParam* p) {
+  void* iter = SyncMessage::GetDataIterator(msg);
+  return ReadParam(msg, &iter, p);
+}
+
+template <class SendParamType, class ReplyParamType>
+bool MessageWithReply<SendParamType, ReplyParamType>::ReadReplyParam(
+    const Message* msg, typename TupleTypes<ReplyParam>::ValueTuple* p) {
+  void* iter = SyncMessage::GetDataIterator(msg);
+  return ReadParam(msg, &iter, p);
+}
+
+}  // namespace IPC
+
+#endif  // IPC_IPC_MESSAGE_UTILS_IMPL_H_