Fixed upgrading and data binding

tools/dom/src/dartium_CustomElementSupport.dart

 // Copyright (c) 2014, 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 dart.dom.html;
 
 /// Dartium ElementUpgrader implementation.
 class _VMElementUpgrader implements ElementUpgrader {
   final Type _type;
   final Type _nativeType;
@@ skipping 10 matching lines @@
     } else {
       if (document.createElement(extendsTag).runtimeType != _nativeType) {
         throw new UnsupportedError(
             'extendsTag does not match base native class');
       }
     }
   }
 
   Element upgrade(element) {
     var jsObject;
-    var tag;
-    if (element.runtimeType == HtmlElement) {
+    var tag = _getCustomElementName(element);
+    if (element.runtimeType == HtmlElement || element.runtimeType == TemplateElement) {
       jsObject = unwrap_jso(element);
-      tag = element.localName;
     } else if (element.runtimeType == js.JsObjectImpl) {
       // It's a Polymer core element (written in JS).
       jsObject = element;
-      tag = element['localName'];
     } else {
       throw new UnsupportedError('Element is incorrect type. Got ${element.runtimeType}, expected HtmlElement/JsObjectImpl.');
     }
 
     // Remember Dart class to tagName for any upgrading done in wrap_jso.
-    _knownCustomeElements[tag] = _type;
+    _knownCustomElements[tag] = _type;
 
     return createCustomUpgrader(_nativeType, jsObject);
   }
 }
 
 /// Validates that the custom type is properly formed-
 ///
 /// * Is a user-defined class.
 /// * Has a created constructor with zero args.
 /// * Derives from an Element subclass.
@@ skipping 42 matching lines @@
   return nativeClass;
 }
 
 
 bool _isBuiltinType(ClassMirror cls) {
   // TODO(vsm): Find a less hackish way to do this.
   LibraryMirror lib = cls.owner;
   String libName = lib.uri.toString();
   return libName.startsWith('dart:');
 }