Bug 1298594: P4. Pop the frame when current time is past the end of the current frame. r=jwwang

Most frames start when the previous one stop.

MozReview-Commit-ID: H92Bmiki49Q

--HG--
extra : rebase_source : 071416d9151d5188550d73f0eb5a4c70a5fbd48b

dom/media/mediasink/VideoSink.cpp

@@ -399,7 +399,7 @@ VideoSink::UpdateRenderedVideoFrames()
   // Skip frames up to the playback position.
   int64_t lastDisplayedFrameEndTime = 0;
   while (VideoQueue().GetSize() > mMinVideoQueueSize &&
-         clockTime > VideoQueue().PeekFront()->GetEndTime()) {
+         clockTime >= VideoQueue().PeekFront()->GetEndTime()) {
     RefPtr<MediaData> frame = VideoQueue().PopFront();
     if (frame->As<VideoData>()->mSentToCompositor) {
       lastDisplayedFrameEndTime = frame->GetEndTime();