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 729d41ec4334c2d0b0c9ab65c59daad4e9fb77ef..f73cc90225cfe131da482d16baa190f9aa7ee12c 100644
--- a/media/blink/webmediaplayer_impl.h
+++ b/media/blink/webmediaplayer_impl.h
@@ -204,7 +204,9 @@ class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
   void DisplayCastFrameAfterSuspend(const scoped_refptr<VideoFrame>& new_frame,
                                     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
@@ -534,6 +536,10 @@ 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.