"DOM HTML">
        [Exposed=Window]
        interface WindowControlsOverlay : EventTarget {
          readonly attribute boolean visible;
          DOMRect getTitlebarAreaRect();
          attribute EventHandler ongeometrychange;
        };

        [Exposed=Window]
        interface WindowControlsOverlayGeometryChangeEvent : Event {
          constructor(DOMString type, WindowControlsOverlayGeometryChangeEventInit eventInitDict);
          [SameObject] readonly attribute DOMRect titlebarAreaRect;
        