Simplify the magic required to create IPC message headers a bit.

ipc/ipc_message.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef IPC_IPC_MESSAGE_H__
 #define IPC_IPC_MESSAGE_H__
 #pragma once
 
 #include <string>
 
@@ skipping 139 matching lines @@
   }
 
   template<class T>
   static bool Dispatch(const Message* msg, T* obj,
                        void (T::*func)(const Message&) const) {
     (obj->*func)(*msg);
     return true;
   }
 
   // Used for async messages with no parameters.
-  static void Log(const Message* msg, std::string* l) {
+  static void Log(std::string* name, const Message* msg, std::string* l) {
   }
 
   // Find the end of the message data that starts at range_start.  Returns NULL
   // if the entire message is not found in the given data range.
   static const char* FindNext(const char* range_start, const char* range_end) {
     return Pickle::FindNext(sizeof(Header), range_start, range_end);
   }
 
 #if defined(OS_POSIX)
   // On POSIX, a message supports reading / writing FileDescriptor objects.
@@ skipping 101 matching lines @@
   MSG_ROUTING_NONE = -2,
 
   // indicates a general message not sent to a particular tab.
   MSG_ROUTING_CONTROL = kint32max,
 };
 
 #define IPC_REPLY_ID 0xFFFFFFF0  // Special message id for replies
 #define IPC_LOGGING_ID 0xFFFFFFF1  // Special message id for logging
 
 #endif  // IPC_IPC_MESSAGE_H__