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

webrtc/pc/trackmediainfomap_unittest.cc

Index: webrtc/pc/trackmediainfomap_unittest.cc
diff --git a/webrtc/pc/trackmediainfomap_unittest.cc b/webrtc/pc/trackmediainfomap_unittest.cc
index b380cc418442d2a9c5c7093f40953e317f0e152c..f0a3f1ad7364f6750e23c75dd8168e3bc01ebbb9 100644
--- a/webrtc/pc/trackmediainfomap_unittest.cc
+++ b/webrtc/pc/trackmediainfomap_unittest.cc
@@ -85,10 +85,12 @@ class TrackMediaInfoMapTest : public testing::Test {
         remote_audio_track_(AudioTrack::Create("RemoteAudioTrack", nullptr)),
         local_video_track_(
             VideoTrack::Create("LocalVideoTrack",
-                               FakeVideoTrackSource::Create(false))),
+                               FakeVideoTrackSource::Create(false),
+                               rtc::Thread::Current())),
         remote_video_track_(
             VideoTrack::Create("RemoteVideoTrack",
-                               FakeVideoTrackSource::Create(false))) {}
+                               FakeVideoTrackSource::Create(false),
+                               rtc::Thread::Current())) {}
 
   ~TrackMediaInfoMapTest() {
     // If we have a map the ownership has been passed to the map, only delete if