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

chrome/browser/renderer_host/chrome_render_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_RENDERER_HOST_CHROME_RENDER_MESSAGE_FILTER_H_
 #define CHROME_BROWSER_RENDERER_HOST_CHROME_RENDER_MESSAGE_FILTER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 34 matching lines @@
         : v8_memory_allocated_(v8_memory_allocated),
           v8_memory_used_(v8_memory_used) {}
     size_t v8_memory_allocated() const { return v8_memory_allocated_; }
     size_t v8_memory_used() const { return v8_memory_used_; }
    private:
     size_t v8_memory_allocated_;
     size_t v8_memory_used_;
   };
 
   // content::BrowserMessageFilter methods:
-  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;
 
   int render_process_id() { return render_process_id_; }
   bool off_the_record() { return off_the_record_; }
   net::HostResolver* GetHostResolver();
 
  private:
   friend class content::BrowserThread;
@@ skipping 95 matching lines @@
   chrome_browser_net::Predictor* predictor_;
   scoped_refptr<net::URLRequestContextGetter> request_context_;
   scoped_refptr<extensions::InfoMap> extension_info_map_;
   // Used to look up permissions at database creation time.
   scoped_refptr<CookieSettings> cookie_settings_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeRenderMessageFilter);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_CHROME_RENDER_MESSAGE_FILTER_H_