Don't we already do that when PIP isn't supported?

Mocks say PiP overflow menu can be hidden AND disabled. For now, we only hide this control if SupportsPictureInPicture returns false. 

As you can see below, we should update this to check when Picture-in-Picture is not available (Android N) AND when it is simply disabled (disablePictureInPicture, feature policy, metadata not loaded, audio-file, etc.)


bool HTMLVideoElement::SupportsPictureInPicture() const {
  return PictureInPictureController::From(GetDocument())
             .IsElementAllowed(*this) ==
         PictureInPictureController::Status::kEnabled;
}

Closing given that that's what we do today.