Add back localName and improve toString for Html nodes.

tools/dom/templates/html/impl/impl_Node.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;
 
 /**
  * Lazy implementation of the child nodes of an element that does not request
  * the actual child nodes of an element until strictly necessary greatly
  * improving performance for the typical cases where it is not required.
@@ skipping 406 matching lines @@
    */
   Stream<Node> get onModelChanged {
     if (_modelChangedStream == null) {
       // Ensure the model is cached locally to minimize change notifications.
       _model = model;
       _modelChangedStream = new StreamController.broadcast();
     }
     return _modelChangedStream.stream;
   }
 
+  /** 
+   * Print out a String representation of this Node.
+   */
+  String toString() => localName == null ? 
+      (nodeValue == null ? super.toString() : nodeValue) : localName;
+
 $!MEMBERS
 }