Revert: Change VideoTrack implementation to invoke VideoTrackSourceInterface::AddOrUpdateSink on wt

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 c3915d1ca7084e13926b25b066ddd91bc4b5b1e3..07436800f85f8f8a9c34072921a0dbdb38be8872 100644
--- a/webrtc/pc/trackmediainfomap_unittest.cc
+++ b/webrtc/pc/trackmediainfomap_unittest.cc
@@ -85,12 +85,10 @@
         remote_audio_track_(AudioTrack::Create("RemoteAudioTrack", nullptr)),
         local_video_track_(
             VideoTrack::Create("LocalVideoTrack",
-                               FakeVideoTrackSource::Create(false),
-                               rtc::Thread::Current())),
+                               FakeVideoTrackSource::Create(false))),
         remote_video_track_(
             VideoTrack::Create("RemoteVideoTrack",
-                               FakeVideoTrackSource::Create(false),
-                               rtc::Thread::Current())) {}
+                               FakeVideoTrackSource::Create(false))) {}
 
   ~TrackMediaInfoMapTest() {
     // If we have a map the ownership has been passed to the map, only delete if