Do not use overlays when VR shell is enabled.

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 6e01840d71c6e0e05129c139d91354fd04f2f4d9..e1606b0d37165ac5e8c7ec37700975f2d756e310 100644
--- a/media/blink/webmediaplayer_impl.h
+++ b/media/blink/webmediaplayer_impl.h
@@ -207,6 +207,7 @@ class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
                                     PipelineStatus status);
   gfx::Size GetCanvasSize() const;
   void SetDeviceScaleFactor(float scale_factor);
+  void SetInVr(bool in_vr);
   void setPoster(const blink::WebURL& poster) override;
   void SetUseFallbackPath(bool use_fallback_path);
 #endif
@@ -539,6 +540,10 @@ class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
   // |force_video_overlays_| is true.)
   bool disable_fullscreen_video_overlays_;
 
+  // Prevent use of SurfaceView on Android. (Overrides
+  // |force_video_overlays_|.)
+  bool in_vr_;
+
   // Suppresses calls to OnPipelineError() after destruction / shutdown has been
   // started; prevents us from spuriously logging errors that are transient or
   // unimportant.