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

extensions/browser/extension_message_filter.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_EXTENSION_MESSAGE_FILTER_H_
 #define EXTENSIONS_BROWSER_EXTENSION_MESSAGE_FILTER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 25 matching lines @@
 
   int render_process_id() { return render_process_id_; }
 
  private:
   virtual ~ExtensionMessageFilter();
 
   // content::BrowserMessageFilter implementation.
   virtual void OverrideThreadForMessage(
       const IPC::Message& message,
       content::BrowserThread::ID* thread) OVERRIDE;
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 bool* message_was_ok) OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // Message handlers on the UI thread.
   void OnExtensionAddListener(const std::string& extension_id,
                               const std::string& event_name);
   void OnExtensionRemoveListener(const std::string& extension_id,
                                  const std::string& event_name);
   void OnExtensionAddLazyListener(const std::string& extension_id,
                                   const std::string& event_name);
   void OnExtensionRemoveLazyListener(const std::string& extension_id,
                                      const std::string& event_name);
@@ skipping 24 matching lines @@
   scoped_refptr<extensions::InfoMap> extension_info_map_;
 
   base::WeakPtrFactory<ExtensionMessageFilter> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionMessageFilter);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_MESSAGE_FILTER_H_