Issue #2762 - Remove SVGZoomEvent interface.

Resolves #2762

dom/svg/SVGSVGElement.h

@@ -131,6 +131,8 @@ public:
    * For use by zoom controls to allow currentScale, currentTranslate.x and
    * currentTranslate.y to be set by a single operation that dispatches a
    * single SVGZoom event (instead of one SVGZoom and two SVGScroll events).
+   *
+   * XXX SVGZoomEvent was removed; is this still needed?
    */
   void SetCurrentScaleTranslate(float s, float x, float y);