Fixed upgrading and data binding

tools/dom/src/dartium_CustomElementSupport.dart

Index: tools/dom/src/dartium_CustomElementSupport.dart
diff --git a/tools/dom/src/dartium_CustomElementSupport.dart b/tools/dom/src/dartium_CustomElementSupport.dart
index edcaec85c42e512d4f664eb9a0dce6bcbe975c9e..b80c1df4f4d253822b14432eba6b1a0089210bb8 100644
--- a/tools/dom/src/dartium_CustomElementSupport.dart
+++ b/tools/dom/src/dartium_CustomElementSupport.dart
@@ -28,20 +28,18 @@ class _VMElementUpgrader implements ElementUpgrader {
 
   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);
   }