Fix dart2js type warnings

sdk/lib/svg/dart2js/svg_dart2js.dart

 /**
  * Scalable Vector Graphics:
  * Two-dimensional vector graphics with support for events and animation.
  *
  * For details about the features and syntax of SVG, a W3C standard,
  * refer to the
  * [Scalable Vector Graphics Specification](http://www.w3.org/TR/SVG/).
  */
 library dart.dom.svg;
 
@@ skipping 5816 matching lines @@
   @DomName('SVGElement.xmllang')
   @DocsEditable()
   @Experimental() // untriaged
   String xmllang;
 
   @DomName('SVGElement.xmlspace')
   @DocsEditable()
   @Experimental() // untriaged
   String xmlspace;
 
+  // From EventTarget
+
+  @DomName('SVGElement.addEventListener')
+  @DocsEditable()
+  @Experimental() // untriaged
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
+
+  @DomName('SVGElement.dispatchEvent')
+  @DocsEditable()
+  @Experimental() // untriaged
+  bool dispatchEvent(Event event) native;
+
+  @DomName('SVGElement.removeEventListener')
+  @DocsEditable()
+  @Experimental() // untriaged
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
+
   @DomName('SVGElement.onabort')
   @DocsEditable()
   @Experimental() // untriaged
   ElementStream<Event> get onAbort => abortEvent.forElement(this);
 
   @DomName('SVGElement.onblur')
   @DocsEditable()
   @Experimental() // untriaged
   ElementStream<Event> get onBlur => blurEvent.forElement(this);
 
@@ skipping 1732 matching lines @@
   @DomName('SVGVKernElement.SVGVKernElement')
   @DocsEditable()
   factory _SVGVKernElement() => _SvgElementFactoryProvider.createSvgElement_tag("vkern");
   /**
    * Constructor instantiated by the DOM when a custom element has been created.
    *
    * This can only be called by subclasses from their created constructor.
    */
   _SVGVKernElement.created() : super.created();
 }