Allow MediaStream constraints to specify higher than 30 FPS 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 120 matching lines @@
   remote_track_->RegisterObserver(this);
 }
 
 MediaStreamRemoteVideoSource::~MediaStreamRemoteVideoSource() {
   remote_track_->UnregisterObserver(this);
 }
 
 void MediaStreamRemoteVideoSource::GetCurrentSupportedFormats(
     int max_requested_width,
     int max_requested_height,
+    double max_requested_frame_rate,
     const VideoCaptureDeviceFormatsCB& callback) {
   DCHECK(thread_checker_.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::VideoCaptureParams& params,
@@ skipping 33 matching lines @@
         SetReadyState(blink::WebMediaStreamSource::ReadyStateEnded);
         break;
       default:
         NOTREACHED();
         break;
     }
   }
 }
 
 }  // namespace content