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

content/browser/renderer_host/memory_benchmark_message_filter.h

 // Copyright (c) 2013 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_MEMORY_BENCHMARK_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEMORY_BENCHMARK_MESSAGE_FILTER_H_
 
 #include <string>
 
 #include "content/public/browser/browser_message_filter.h"
 
 namespace content {
 
 class MemoryBenchmarkMessageFilter : public BrowserMessageFilter {
  public:
   MemoryBenchmarkMessageFilter();
 
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 bool* message_was_ok) OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  private:
   virtual ~MemoryBenchmarkMessageFilter();
 
   void OnHeapProfilerDump(const std::string& reason);
 
   DISALLOW_COPY_AND_ASSIGN(MemoryBenchmarkMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEMORY_BENCHMARK_MESSAGE_FILTER_H_