Cleanup queryAll to return List<Element>.

lib/dom/templates/html/impl/impl_Element.darttemplate

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // TODO(jacobr): use _Lists.dart to remove some of the duplicated
 // functionality.
 class _ChildrenElementList implements ElementList {
   // Raw Element.
   final _ElementImpl _element;
   final _HTMLCollectionImpl _childElements;
@@ skipping 663 matching lines @@
   void set elements(Collection<Element> value) {
     final elements = this.elements;
     elements.clear();
     elements.addAll(value);
   }
 
   ElementList get elements() => new _ChildrenElementList._wrap(this);
 
   _ElementImpl query(String selectors) => $dom_querySelector(selectors);
 
-  ElementList queryAll(String selectors) =>
+  List<Element> queryAll(String selectors) =>
     new _FrozenElementList._wrap($dom_querySelectorAll(selectors));
 
   _CssClassSet get classes() => new _CssClassSet(this);
 
   void set classes(Collection<String> value) {
     _CssClassSet classSet = classes;
     classSet.clear();
     classSet.addAll(value);
   }
 
@@ skipping 81 matching lines @@
 
   /** @domName Document.createElement */
 $if FROG
   // Optimization to improve performance until the frog compiler inlines this
   // method.
   factory Element.tag(String tag) native "return document.createElement(tag)";
 $else
   factory Element.tag(String tag) => _document.$dom_createElement(tag);
 $endif
 }