update polymer to 0.3.5

pkg/template_binding/lib/src/template.dart

 // Copyright (c) 2013, 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 template_binding;
 
 /** Extensions to [Element]s that behave as templates. */
 class TemplateBindExtension extends NodeBindExtension {
   var _model;
   BindingDelegate _bindingDelegate;
@@ skipping 166 matching lines @@
     _setModelScheduled = false;
     var map = _getBindings(_node, _bindingDelegate);
     _processBindings(_node, map, _model);
   }
 
   _refChanged() {
     if (_iterator == null || _refContent == templateBind(_ref).content) return;
 
     _refContent = null;
     _iterator._valueChanged(null);
-    _iterator._updateIteratedValue(null);
+    _iterator._updateIteratedValue(this._iterator._getUpdatedValue());
   }
 
   void clear() {
     _model = null;
     _bindingDelegate = null;
     if (bindings != null) {
       var ref = bindings.remove('ref');
       if (ref != null) ref.close();
     }
     _refContent = null;
@@ skipping 329 matching lines @@
 }
 
 // Note: JS code tests that getElementById is present. We can't do that
 // easily, so instead check for the types known to implement it.
 bool _hasGetElementById(Node node) =>
     node is Document || node is ShadowRoot || node is SvgSvgElement;
 
 final Expando<_InstanceExtension> _instanceExtension = new Expando();
 
 final _isStagingDocument = new Expando();