create one video capture message filter per renderer process

content/renderer/media/video_capture_impl.h

 // Copyright (c) 2011 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.
 
 // VideoCaptureImpl represents a capture device in renderer process. It provides
 // interfaces for clients to Start/Stop capture. It also communicates to clients
 // when buffer is ready, state of capture device is changed.
 
 #ifndef CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_H_
@@ skipping 58 matching lines @@
                    VideoCaptureMessageFilter* filter);
   virtual ~VideoCaptureImpl();
 
   void Init();
   void DeInit(Task* task);
   void StopDevice();
   void RestartCapture();
   void StartCaptureInternal();
   void AddDelegateOnIOThread();
   void RemoveDelegateOnIOThread(Task* task);
+  virtual void Send(IPC::Message* message);
 
   scoped_refptr<VideoCaptureMessageFilter> message_filter_;
   media::VideoCaptureSessionId session_id_;
   scoped_refptr<base::MessageLoopProxy> ml_proxy_;
   int device_id_;
 
   // Pool of DIBs.
   typedef std::list<DIBBuffer*> CachedDIB;
   CachedDIB cached_dibs_;
 
@@ skipping 12 matching lines @@
   int new_width_;
   int new_height_;
   State state_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureImpl);
 };
 
 DISABLE_RUNNABLE_METHOD_REFCOUNT(VideoCaptureImpl);
 
 #endif  // CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_H_