Add flag to signal that video frame must be drawn using an overlay.

media/base/video_frame_metadata.h

Index: media/base/video_frame_metadata.h
diff --git a/media/base/video_frame_metadata.h b/media/base/video_frame_metadata.h
index ce341699752dc9e91901a163569d3699ed7cc9bc..6d2c6a98be12f6d17183b87331839742ef01865a 100644
--- a/media/base/video_frame_metadata.h
+++ b/media/base/video_frame_metadata.h
@@ -114,6 +114,10 @@ class MEDIA_EXPORT VideoFrameMetadata {
     // notified about its promotability to an overlay.
     WANTS_PROMOTION_HINT,
 
+    // Windows only: if set, then this frame must be displayed in an overlay
+    // rahter than with the GLRenderer.

[danakj, 2017/06/07 15:26:40]

typo: rather

maybe instead of naming the GLRenderer here, "rather than being composited into
the framebuffer" ?

+    REQUIRE_OVERLAY,
+
     NUM_KEYS
   };