Fixes in webui for sdk 0.6.3

lib/web_ui.dart

 // 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.
 
 /**
  * This library exports all of the commonly used functions and types for
  * building UI's. It is equivalent to the following imports:
  *
  *     import 'package:web_ui/observe.dart';
  *     import 'package:web_ui/safe_html.dart';
@@ skipping 116 matching lines @@
   get model => host.model;
 
   void set model(newModel) {
     host.model = newModel;
   }
 
   get templateInstance => host.templateInstance;
   get isTemplate => host.isTemplate;
   get ref => host.ref;
   get content => host.content;
-  DocumentFragment createInstance() => host.createInstance();
+  DocumentFragment createInstance(model, String syntax) =>
+      host.createInstance(model, syntax);
   void bind(String name, model, String path) => host.bind(name, model, path);
   void unbind(String name) => host.unbind(name);
   void unbindAll() => host.unbindAll();
 
 
   /**
    * **Note**: This is an implementation helper and should not need to be called
    * from your code.
    *
    * If [ShadowRoot.supported] or [useShadowDom] is false, this distributes
@@ skipping 610 matching lines @@
 }
 
 /**
  * Set this to true to use native Shadow DOM if it is supported.
  * Note that this will change behavior of [WebComponent] APIs for tree
  * traversal.
  */
 bool useShadowDom = false;
 
 bool get _realShadowRoot => useShadowDom && ShadowRoot.supported;