[Media, Video] Enable the video track for a new renderer.

media/blink/webmediaplayer_impl.h

Index: media/blink/webmediaplayer_impl.h
diff --git a/media/blink/webmediaplayer_impl.h b/media/blink/webmediaplayer_impl.h
index ac80c099c3ec0199b182fdce94cd6a6867b32c6b..e7d359f19b432b9265602651718a27d0f425948f 100644
--- a/media/blink/webmediaplayer_impl.h
+++ b/media/blink/webmediaplayer_impl.h
@@ -251,6 +251,7 @@ class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
   void DisableOverlay();
 
   void OnPipelineSuspended();
+  void OnPipelineResumed();
   void OnDemuxerOpened();
 
   // Pipeline::Client overrides.
@@ -599,6 +600,9 @@ class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
   // Whether the player is currently in autoplay muted state.
   bool autoplay_muted_ = false;
 
+  // Whether disabled the video track as an optimization.
+  bool video_track_disabled_ = false;
+
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };