[cssom-view] Use DOMQuadInit in GeometryUtils convertQuadFromNode()

Author: zcorpan

cssom-view/Overview.bs

@@ -1476,7 +1476,7 @@ dictionary ConvertCoordinateOptions {
 [NoInterfaceObject]
 interface GeometryUtils {
   sequence<DOMQuad> getBoxQuads(optional BoxQuadOptions options);
-  DOMQuad convertQuadFromNode(DOMQuad quad, GeometryNode from, optional ConvertCoordinateOptions options);
+  DOMQuad convertQuadFromNode(DOMQuadInit quad, GeometryNode from, optional ConvertCoordinateOptions options);
   DOMQuad convertRectFromNode(DOMRectReadOnly rect, GeometryNode from, optional ConvertCoordinateOptions options);
   DOMPoint convertPointFromNode(DOMPointInit point, GeometryNode from, optional ConvertCoordinateOptions options); // XXX z,w turns into 0
 };