New resolution change policies for desktop and tab capture.

content/renderer/media/webrtc/media_stream_remote_video_source.cc

 // 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.
 
 #include "content/renderer/media/webrtc/media_stream_remote_video_source.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 121 matching lines @@
     const VideoCaptureDeviceFormatsCB& callback) {
   DCHECK(CalledOnValidThread());
   media::VideoCaptureFormats formats;
   // Since the remote end is free to change the resolution at any point in time
   // the supported formats are unknown.
   callback.Run(formats);
 }
 
 void MediaStreamRemoteVideoSource::StartSourceImpl(
     const media::VideoCaptureFormat& format,
+    const blink::WebMediaConstraints& constraints,
     const VideoCaptureDeliverFrameCB& frame_callback) {
   DCHECK(CalledOnValidThread());
   DCHECK(!delegate_.get());
   delegate_ = new RemoteVideoSourceDelegate(io_message_loop(), frame_callback);
   scoped_refptr<webrtc::VideoTrackInterface> video_track(
       static_cast<webrtc::VideoTrackInterface*>(observer_->track().get()));
   video_track->AddRenderer(delegate_.get());
   OnStartDone(MEDIA_DEVICE_OK);
 }
 
@@ skipping 24 matching lines @@
     case webrtc::MediaStreamTrackInterface::kEnded:
       SetReadyState(blink::WebMediaStreamSource::ReadyStateEnded);
       break;
     default:
       NOTREACHED();
       break;
   }
 }
 
 }  // namespace content