Reland of Change VideoTrack implementation to invoke VideoTrackSourceInterface::AddOrUpdateSink on …

webrtc/pc/peerconnectionfactory.cc

 /*
  *  Copyright 2004 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 274 matching lines @@
   RTC_DCHECK(signaling_thread_->IsCurrent());
   return MediaStreamProxy::Create(signaling_thread_,
                                   MediaStream::Create(label));
 }
 
 rtc::scoped_refptr<VideoTrackInterface> PeerConnectionFactory::CreateVideoTrack(
     const std::string& id,
     VideoTrackSourceInterface* source) {
   RTC_DCHECK(signaling_thread_->IsCurrent());
   rtc::scoped_refptr<VideoTrackInterface> track(
-      VideoTrack::Create(id, source));
+      VideoTrack::Create(id, source, worker_thread_));
   return VideoTrackProxy::Create(signaling_thread_, worker_thread_, track);
 }
 
 rtc::scoped_refptr<AudioTrackInterface>
 PeerConnectionFactory::CreateAudioTrack(const std::string& id,
                                         AudioSourceInterface* source) {
   RTC_DCHECK(signaling_thread_->IsCurrent());
   rtc::scoped_refptr<AudioTrackInterface> track(AudioTrack::Create(id, source));
   return AudioTrackProxy::Create(signaling_thread_, track);
 }
@@ skipping 37 matching lines @@
   }
   call_config.audio_state = channel_manager_->media_engine()->GetAudioState();
   call_config.bitrate_config.min_bitrate_bps = kMinBandwidthBps;
   call_config.bitrate_config.start_bitrate_bps = kStartBandwidthBps;
   call_config.bitrate_config.max_bitrate_bps = kMaxBandwidthBps;
 
   return std::unique_ptr<Call>(call_factory_->CreateCall(call_config));
 }
 
 }  // namespace webrtc