This is a request for WebKit's position on extending getDisplayMedia to also accept MediaTrackConstraintSet.displaySurface. The PR that introduced this behavior to the getDisplayMedia spec was approved by Apple engineer Youenn Fablet.

Links:
* Explainer: https://docs.google.com/document/d/1uI51R4YfFQtfiDTw1KfnLqzIu45OgxhYoUT7khlhmwQ/edit?usp=sharing
* Spec: https://github.com/w3c/mediacapture-screen-share/pull/186/files
* ChromeStatus entry: https://chromestatus.com/feature/5186392840732672