Reland of Change VideoTrack implementation to invoke VideoTrackSourceInterface::AddOrUpdateSink on wt
Added documentation of thread expectations for video tracks and sources to the API.
Originally landed as patchset #2 id:20001 of https://codereview.webrtc.org/2964863002/.
Patchset 1 is the originall cl.
Patschet 2 is modified so that VideoTrackInterface::AddSink and RemoveSink have a default implementation.
BUG=none
Review-Url: https://codereview.webrtc.org/2989113002
Cr-Commit-Position: refs/heads/master@{#19195}
diff --git a/webrtc/pc/videotrack_unittest.cc b/webrtc/pc/videotrack_unittest.cc
index d033efe..1f569eb 100644
--- a/webrtc/pc/videotrack_unittest.cc
+++ b/webrtc/pc/videotrack_unittest.cc
@@ -31,7 +31,8 @@
static const char kVideoTrackId[] = "track_id";
video_track_source_ = new rtc::RefCountedObject<VideoTrackSource>(
&capturer_, true /* remote */);
- video_track_ = VideoTrack::Create(kVideoTrackId, video_track_source_);
+ video_track_ = VideoTrack::Create(kVideoTrackId, video_track_source_,
+ rtc::Thread::Current());
capturer_.Start(
cricket::VideoFormat(640, 480, cricket::VideoFormat::FpsToInterval(30),
cricket::FOURCC_I420));