cc: Video layers without a frame should not occlude

content/renderer/media/android/webmediaplayer_android.h

Index: content/renderer/media/android/webmediaplayer_android.h
diff --git a/content/renderer/media/android/webmediaplayer_android.h b/content/renderer/media/android/webmediaplayer_android.h
index 5d5f6539fb03516a2f9f463771e33070b325e3ba..2627ac03a5a648d442539575fce6fc26cc9f2300 100644
--- a/content/renderer/media/android/webmediaplayer_android.h
+++ b/content/renderer/media/android/webmediaplayer_android.h
@@ -187,6 +187,7 @@ class WebMediaPlayerAndroid : public blink::WebMediaPlayer,
       cc::VideoFrameProvider::Client* client) override;
   bool UpdateCurrentFrame(base::TimeTicks deadline_min,
                           base::TimeTicks deadline_max) override;
+  bool HasCurrentFrame() override;
   scoped_refptr<media::VideoFrame> GetCurrentFrame() override;
   void PutCurrentFrame() override;