Remove IPC_BEGIN_MESSAGE_MAP_EX macro since r270839 made all bad IPCs kill their child processes.

content/browser/renderer_host/gpu_message_filter.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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_GPU_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_GPU_MESSAGE_FILTER_H_
 
 #include <vector>
 
 #include "base/memory/linked_ptr.h"
@@ skipping 18 matching lines @@
 
 // A message filter for messages from the renderer to the GpuProcessHost(UIShim)
 // in the browser. Such messages are typically destined for the GPU process,
 // but need to be mediated by the browser.
 class GpuMessageFilter : public BrowserMessageFilter {
  public:
   GpuMessageFilter(int render_process_id,
                    RenderWidgetHelper* render_widget_helper);
 
   // BrowserMessageFilter methods:
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 bool* message_was_ok) OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // This set of API is used to subscribe to frame presentation events.
   // See RenderWidgetHostViewFrameSubscriber for more details.
   void BeginFrameSubscription(
       int route_id,
       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber);
   void EndFrameSubscription(int route_id);
 
  private:
   friend class BrowserThread;
@@ skipping 34 matching lines @@
 
   typedef std::vector<linked_ptr<FrameSubscription> > FrameSubscriptionList;
   FrameSubscriptionList frame_subscription_list_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_GPU_MESSAGE_FILTER_H_