cc: Video layers without a frame should not occlude

media/blink/video_frame_compositor.cc

Index: media/blink/video_frame_compositor.cc
diff --git a/media/blink/video_frame_compositor.cc b/media/blink/video_frame_compositor.cc
index 3e19254f67bc5ed4229dd09798b8028516393466..fb87622254b7d2b07214c0569e4671a6d91fbe53 100644
--- a/media/blink/video_frame_compositor.cc
+++ b/media/blink/video_frame_compositor.cc
@@ -124,6 +124,10 @@ bool VideoFrameCompositor::UpdateCurrentFrame(base::TimeTicks deadline_min,
   return CallRender(deadline_min, deadline_max, false);
 }
 
+bool VideoFrameCompositor::HasCurrentFrame() const {
+  return current_frame_;

[danakj, 2015/05/18 18:15:45]

can you DCHECK the thread here also?

[hendrikw, 2015/05/18 18:33:59]

Good catch, Done.

+}
+
 void VideoFrameCompositor::Start(RenderCallback* callback) {
   TRACE_EVENT0("media", "VideoFrameCompositor::Start");