Do not use overlays when VR shell is enabled.

media/blink/webmediaplayer_impl.cc

Index: media/blink/webmediaplayer_impl.cc
diff --git a/media/blink/webmediaplayer_impl.cc b/media/blink/webmediaplayer_impl.cc
index a105327d0635b16c4d2fdc937a2cb7a89c32fa91..5da42d012b55a0e6e867be9fa6a9efa2360b1353 100644
--- a/media/blink/webmediaplayer_impl.cc
+++ b/media/blink/webmediaplayer_impl.cc
@@ -250,9 +250,6 @@ WebMediaPlayerImpl::WebMediaPlayerImpl(
   force_video_overlays_ = base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kForceVideoOverlays);
 
-  disable_fullscreen_video_overlays_ =
-      !base::FeatureList::IsEnabled(media::kOverlayFullscreenVideo);
-
   if (delegate_)
     delegate_id_ = delegate_->AddObserver(this);
 
@@ -345,14 +342,14 @@ void WebMediaPlayerImpl::DisableOverlay() {
 }
 
 void WebMediaPlayerImpl::enteredFullscreen() {
-  if (!force_video_overlays_ && !disable_fullscreen_video_overlays_)
+  if (!force_video_overlays_ && enable_fullscreen_video_overlays_)
     EnableOverlay();
   if (observer_)
     observer_->OnEnteredFullscreen();
 }
 
 void WebMediaPlayerImpl::exitedFullscreen() {
-  if (!force_video_overlays_ && !disable_fullscreen_video_overlays_)
+  if (!force_video_overlays_ && enable_fullscreen_video_overlays_)
     DisableOverlay();
   if (observer_)
     observer_->OnExitedFullscreen();
@@ -1466,6 +1463,10 @@ void WebMediaPlayerImpl::SetDeviceScaleFactor(float scale_factor) {
   cast_impl_.SetDeviceScaleFactor(scale_factor);
 }
 
+void WebMediaPlayerImpl::SetEnableFullscreenOverlays(bool enable_overlays) {
+  enable_fullscreen_video_overlays_ = enable_overlays;
+}
+
 void WebMediaPlayerImpl::setPoster(const blink::WebURL& poster) {
   cast_impl_.setPoster(poster);
 }