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

content/browser/renderer_host/gamepad_browser_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_GAMEPAD_BROWSER_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_GAMEPAD_BROWSER_MESSAGE_FILTER_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/shared_memory.h"
 #include "content/browser/gamepad/gamepad_consumer.h"
 #include "content/public/browser/browser_message_filter.h"
 
 namespace content {
 
 class GamepadService;
 class RenderProcessHost;
 
 class GamepadBrowserMessageFilter :
     public BrowserMessageFilter,
     public GamepadConsumer {
  public:
   GamepadBrowserMessageFilter();
 
   // BrowserMessageFilter implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 bool* message_was_ok) OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // GamepadConsumer implementation.
   virtual void OnGamepadConnected(
       unsigned index,
       const blink::WebGamepad& gamepad) OVERRIDE;
   virtual void OnGamepadDisconnected(
       unsigned index,
       const blink::WebGamepad& gamepad) OVERRIDE;
 
  private:
   virtual ~GamepadBrowserMessageFilter();
 
   void OnGamepadStartPolling(base::SharedMemoryHandle* renderer_handle);
   void OnGamepadStopPolling();
 
   bool is_started_;
 
   DISALLOW_COPY_AND_ASSIGN(GamepadBrowserMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_GAMEPAD_BROWSER_MESSAGE_FILTER_H_