WMPI: Add base::Feature for disabling SurfaceViews.

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 3389d4a33706376b74273ac2d14951542df66f04..74f894cd343f2db5fed05dfff7a0040aef2ddacc 100644
--- a/media/blink/webmediaplayer_impl.cc
+++ b/media/blink/webmediaplayer_impl.cc
@@ -234,6 +234,9 @@ 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);
 
@@ -331,12 +334,12 @@ void WebMediaPlayerImpl::DisableOverlay() {
 }
 
 void WebMediaPlayerImpl::enteredFullscreen() {
-  if (!force_video_overlays_)
+  if (!force_video_overlays_ && !disable_fullscreen_video_overlays_)
     EnableOverlay();
 }
 
 void WebMediaPlayerImpl::exitedFullscreen() {
-  if (!force_video_overlays_)
+  if (!force_video_overlays_ && !disable_fullscreen_video_overlays_)
     DisableOverlay();
 }