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

content/browser/browser_plugin/browser_plugin_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_BROWSER_PLUGIN_BROWSER_PLUGIN_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_MESSAGE_FILTER_H_
 
 #include "content/public/browser/browser_message_filter.h"
 
 struct FrameHostMsg_BuffersSwappedACK_Params;
 
 namespace content {
 
 class BrowserContext;
 
 // This class filters out incoming IPC messages for the guest renderer process
 // on the IPC thread before other message filters handle them.
 class BrowserPluginMessageFilter : public BrowserMessageFilter {
  public:
   BrowserPluginMessageFilter(int render_process_id, bool is_guest);
 
   // BrowserMessageFilter implementation.
   virtual void OverrideThreadForMessage(
     const IPC::Message& message,
     BrowserThread::ID* thread) OVERRIDE;
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 bool* message_was_ok) OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void OnDestruct() const OVERRIDE;
 
  private:
   friend class BrowserThread;
   friend class base::DeleteHelper<BrowserPluginMessageFilter>;
 
   virtual ~BrowserPluginMessageFilter();
 
   void ForwardMessageToGuest(const IPC::Message& message);
 
   void OnSwapBuffersACK(const FrameHostMsg_BuffersSwappedACK_Params& params);
 
   int render_process_id_;
   int is_guest_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginMessageFilter);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_MESSAGE_FILTER_H_