Make the video layer visibility configurable in OverlayFullscreenVideo mode

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 55f0bb4d99353073a1ff048adbf3a11e138aefe7..6a09b19025fed562385ee4ba3d052db94f7d6427 100644
--- a/media/blink/webmediaplayer_impl.cc
+++ b/media/blink/webmediaplayer_impl.cc
@@ -268,7 +268,8 @@ void WebMediaPlayerImpl::load(LoadType load_type,
   DoLoad(load_type, url, cors_mode);
 }
 
-bool WebMediaPlayerImpl::supportsOverlayFullscreenVideo() {
+WebMediaPlayer::OverlayFullscreenVideoMode
+WebMediaPlayerImpl::getOverlayFullscreenVideoMode() {
 #if defined(OS_ANDROID)
   // OverlayFullscreenVideo is only used when we're H/W decoding to an
   // SurfaceView underlay on Android. It's possible that we haven't initialized
@@ -285,9 +286,11 @@ bool WebMediaPlayerImpl::supportsOverlayFullscreenVideo() {
     supports_overlay_fullscreen_video_ =
         decoder_requires_restart_for_fullscreen_;
   }
-  return supports_overlay_fullscreen_video_;
+  return supports_overlay_fullscreen_video_
+             ? WebMediaPlayer::OverlayFullscreenVideoMode::VideoLayerVisible
+             : WebMediaPlayer::OverlayFullscreenVideoMode::Disabled;
 #else
-  return false;
+  return WebMediaPlayer::OverlayFullscreenVideoMode::Disabled;
 #endif
 }