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

chrome/common/gpu_messages.cc

 // 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.
 
-#include "chrome/common/gpu_messages.h"
-
 #include "chrome/common/gpu_create_command_buffer_config.h"
 #include "chrome/common/gpu_info.h"
 #include "chrome/common/dx_diag_node.h"
 #include "gfx/rect.h"
 #include "gfx/size.h"
 #include "ipc/ipc_channel_handle.h"
-#include "ipc/ipc_message_utils.h"
 
-#define MESSAGES_INTERNAL_IMPL_FILE \
-  "chrome/common/gpu_messages_internal.h"
-#include "ipc/ipc_message_impl_macros.h"
+#define IPC_MESSAGE_IMPL
+#include "chrome/common/gpu_messages.h"
 
 #if defined(OS_MACOSX)
 
 // Parameters for the GpuHostMsg_AcceleratedSurfaceSetIOSurface
 // message, which has too many parameters to be sent with the
 // predefined IPC macros.
 GpuHostMsg_AcceleratedSurfaceSetIOSurface_Params::
     GpuHostMsg_AcceleratedSurfaceSetIOSurface_Params()
         : renderer_id(0),
           render_view_id(0),
@@ skipping 232 matching lines @@
   }
   return true;
 }
 
 void ParamTraits<GPUCreateCommandBufferConfig> ::Log(
     const param_type& p, std::string* l) {
   l->append("<GPUCreateCommandBufferConfig>");
 }
 
 }  // namespace IPC