Add metadata to media::VideoFrame and plumb it through IPC/MediaStream.

content/browser/renderer_host/media/video_capture_controller.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.
 //
 // VideoCaptureController is the glue between a VideoCaptureDevice and all
 // VideoCaptureHosts that have connected to it. A controller exists on behalf of
 // one (and only one) VideoCaptureDevice; both are owned by the
 // VideoCaptureManager.
 //
 // The VideoCaptureController is responsible for:
@@ skipping 115 matching lines @@
 
  private:
   class VideoCaptureDeviceClient;
 
   struct ControllerClient;
   typedef std::list<ControllerClient*> ControllerClients;
 
   // Worker functions on IO thread. Called by the VideoCaptureDeviceClient.
   void DoIncomingCapturedVideoFrameOnIOThread(
       const scoped_refptr<media::VideoCaptureDevice::Client::Buffer>& buffer,
-      const media::VideoCaptureFormat& format,
       const scoped_refptr<media::VideoFrame>& frame,
       const base::TimeTicks& timestamp);
   void DoErrorOnIOThread();
   void DoDeviceStoppedOnIOThread();
   void DoBufferDestroyedOnIOThread(int buffer_id_to_drop);
 
   // Find a client of |id| and |handler| in |clients|.
   ControllerClient* FindClient(const VideoCaptureControllerID& id,
                                VideoCaptureControllerEventHandler* handler,
                                const ControllerClients& clients);
@@ skipping 18 matching lines @@
   media::VideoCaptureFormat video_capture_format_;
 
   base::WeakPtrFactory<VideoCaptureController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureController);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_H_