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

webrtc/ortc/ortcfactory.cc

 /*
  *  Copyright 2017 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 461 matching lines @@
       VideoCapturerTrackSource::Create(
           worker_thread_.get(), std::move(capturer), constraints, false));
   return VideoTrackSourceProxy::Create(signaling_thread_, worker_thread_.get(),
                                        source);
 }
 
 rtc::scoped_refptr<VideoTrackInterface> OrtcFactory::CreateVideoTrack(
     const std::string& id,
     VideoTrackSourceInterface* source) {
   RTC_DCHECK_RUN_ON(signaling_thread_);
-  rtc::scoped_refptr<VideoTrackInterface> track(VideoTrack::Create(id, source));
+  rtc::scoped_refptr<VideoTrackInterface> track(
+      VideoTrack::Create(id, source, worker_thread_.get()));
   return VideoTrackProxy::Create(signaling_thread_, worker_thread_.get(),
                                  track);
 }
 
 rtc::scoped_refptr<AudioTrackInterface> OrtcFactory::CreateAudioTrack(
     const std::string& id,
     AudioSourceInterface* source) {
   RTC_DCHECK_RUN_ON(signaling_thread_);
   rtc::scoped_refptr<AudioTrackInterface> track(AudioTrack::Create(id, source));
   return AudioTrackProxy::Create(signaling_thread_, track);
@@ skipping 51 matching lines @@
   //
   // Note that |adm_| may be null, in which case the platform-specific default
   // AudioDeviceModule will be used.
   return std::unique_ptr<cricket::MediaEngineInterface>(
       cricket::WebRtcMediaEngineFactory::Create(
           adm_, audio_encoder_factory_, audio_decoder_factory_, nullptr,
           nullptr, nullptr, webrtc::AudioProcessing::Create()));
 }
 
 }  // namespace webrtc