WMPI: Add base::Feature for disabling SurfaceViews.

media/base/media_switches.h

Index: media/base/media_switches.h
diff --git a/media/base/media_switches.h b/media/base/media_switches.h
index d4b47cc2af63168a884fe27fb9fba5e4d6be2183..e6df87117ef8229029c883dc63f7a695ffc6ead8 100644
--- a/media/base/media_switches.h
+++ b/media/base/media_switches.h
@@ -84,6 +84,7 @@ MEDIA_EXPORT extern const base::Feature kFlashJoinsMediaSession;
 #endif  // defined(ENABLE_PLUGINS)
 
 MEDIA_EXPORT extern const base::Feature kNewAudioRenderingMixingStrategy;
+MEDIA_EXPORT extern const base::Feature kOverlayFullscreenVideo;
 MEDIA_EXPORT extern const base::Feature kResumeBackgroundVideo;
 MEDIA_EXPORT extern const base::Feature kUseNewMediaCache;
 MEDIA_EXPORT extern const base::Feature kVideoColorManagement;