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

content/browser/renderer_host/media/video_capture_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.
 //
 // VideoCaptureHost serves video capture related messages from
 // VideoCaptureMessageFilter which lives inside the render process.
 //
 // This class is owned by RenderProcessHostImpl, and instantiated on UI
 // thread, but all other operations and method calls happen on IO thread.
 //
@@ skipping 55 matching lines @@
 
 class CONTENT_EXPORT VideoCaptureHost
     : public BrowserMessageFilter,
       public VideoCaptureControllerEventHandler {
  public:
   explicit VideoCaptureHost(MediaStreamManager* media_stream_manager);
 
   // BrowserMessageFilter implementation.
   virtual void OnChannelClosing() OVERRIDE;
   virtual void OnDestruct() const OVERRIDE;
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 bool* message_was_ok) OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // VideoCaptureControllerEventHandler implementation.
   virtual void OnError(const VideoCaptureControllerID& id) OVERRIDE;
   virtual void OnBufferCreated(const VideoCaptureControllerID& id,
                                base::SharedMemoryHandle handle,
                                int length,
                                int buffer_id) OVERRIDE;
   virtual void OnBufferDestroyed(const VideoCaptureControllerID& id,
                                  int buffer_id) OVERRIDE;
   virtual void OnBufferReady(const VideoCaptureControllerID& id,
@@ skipping 99 matching lines @@
   // is connected. An entry in this map holds a null controller while it is in
   // the process of starting.
   EntryMap entries_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_HOST_H_