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

content/browser/renderer_host/media/media_stream_dispatcher_host.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_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_
 
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 37 matching lines @@
   virtual void DevicesEnumerated(int render_view_id,
                                  int page_request_id,
                                  const std::string& label,
                                  const StreamDeviceInfoArray& devices) OVERRIDE;
   virtual void DeviceOpened(int render_view_id,
                             int page_request_id,
                             const std::string& label,
                             const StreamDeviceInfo& video_device) OVERRIDE;
 
   // BrowserMessageFilter implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 bool* message_was_ok) OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void OnChannelClosing() OVERRIDE;
 
  protected:
   virtual ~MediaStreamDispatcherHost();
 
  private:
   friend class MockMediaStreamDispatcherHost;
 
   void OnGenerateStream(int render_view_id,
                         int page_request_id,
@@ skipping 31 matching lines @@
   int render_process_id_;
   ResourceContext::SaltCallback salt_callback_;
   MediaStreamManager* media_stream_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_