Fixing issues from IDL upgrade

tools/dom/templates/html/impl/impl_Document.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.
 
 part of $LIBRARYNAME;
 
 @DocsEditable()
 $(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME extends Node $NATIVESPEC
 {
 
@@ skipping 11 matching lines @@
    *
    *     var items = document.querySelectorAll('.itemClassName');
    *
    * For details about CSS selector syntax, see the
    * [CSS selector specification](http://www.w3.org/TR/css3-selectors/).
    */
   ElementList querySelectorAll(String selectors) {
     return new _FrozenElementList._wrap(_querySelectorAll(selectors));
   }
 
-  /** 
+  /**
    * Alias for [querySelector]. Note this function is deprecated because its
    * semantics will be changing in the future.
    */
   @deprecated
   @Experimental()
   @DomName('Document.querySelector')
   Element query(String relativeSelectors) => querySelector(relativeSelectors);
 
-  /** 
+  /**
    * Alias for [querySelectorAll]. Note this function is deprecated because its
    * semantics will be changing in the future.
    */
   @deprecated
   @Experimental()
   @DomName('Document.querySelectorAll')
   ElementList queryAll(String relativeSelectors) =>
       querySelectorAll(relativeSelectors);
 
   /// Checks if [register] is supported on the current platform.
@@ skipping 11 matching lines @@
     return _createElement(tagName, typeExtension);
 $else
     if (typeExtension != null) {
       return _createElement(tagName, typeExtension);
     } else {
       // Fast-path for Dartium when typeExtension is not needed.
       return _Utils.createElement(this, tagName);
     }
 $endif
   }
+
+$if DART2JS
+  @DomName('Document.createNodeIterator')
+  NodeIterator _createNodeIterator(Node root,
+      [int whatToShow, NodeFilter filter])
+      => JS('NodeIterator', '#.createNodeIterator(#, #, #, false)',
+          this, root, whatToShow, filter);
+
+  @DomName('Document.createTreeWalker')
+  TreeWalker _createTreeWalker(Node root,
+      [int whatToShow, NodeFilter filter])
+      => JS('TreeWalker', '#.createTreeWalker(#, #, #, false)',
+          this, root, whatToShow, filter);
+$endif
 }