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

chrome/browser/prerender/prerender_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 CHROME_BROWSER_PRERENDER_PRERENDER_MESSAGE_FILTER_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_MESSAGE_FILTER_H_
 
 #include "base/compiler_specific.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "url/gurl.h"
@@ skipping 16 matching lines @@
 namespace prerender {
 
 class PrerenderMessageFilter : public content::BrowserMessageFilter {
  public:
   PrerenderMessageFilter(int render_process_id, Profile* profile);
 
  private:
   virtual ~PrerenderMessageFilter();
 
   // Overridden from content::BrowserMessageFilter.
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 bool* message_was_ok) OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void OverrideThreadForMessage(
       const IPC::Message& message,
       content::BrowserThread::ID* thread) OVERRIDE;
   virtual void OnChannelClosing() OVERRIDE;
 
   void OnAddPrerender(int prerender_id,
                       const PrerenderAttributes& attributes,
                       const content::Referrer& referrer,
                       const gfx::Size& size,
                       int render_view_route_id);
   void OnCancelPrerender(int prerender_id);
   void OnAbandonPrerender(int prerender_id);
 
   const int render_process_id_;
   Profile* const profile_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderMessageFilter);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_MESSAGE_FILTER_H_