Fix type problem with FilteredElementList._iterable

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 4781 matching lines @@
     } else {
       parentElement = new SvgSvgElement();
     }
     var fragment = parentElement.createFragment(svg, validator: validator,
         treeSanitizer: treeSanitizer);
     return fragment.nodes.where((e) => e is SvgElement).single;
   }
 
   CssClassSet get classes => new _AttributeClassSet(this);
 
-  List<Element> get children => new FilteredElementList<Element>(this);
+  List<Element> get children => new FilteredElementList(this);
 
   void set children(List<Element> value) {
     final children = this.children;
     children.clear();
     children.addAll(value);
   }
 
   String get outerHtml {
     final container = new Element.tag("div");
     final SvgElement cloned = this.clone(true);
@@ skipping 1985 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();
 }