remove bindModel, the same effect can be achieved through createInstance

pkg/mdv/lib/mdv.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.
 
 // TODO(jmesserly): more commentary here.
 /**
  * This library provides access to Model-Driven-Views APIs on HTML elements.
  * More information can be found at: <https://github.com/toolkitchen/mdv>.
  */
 library mdv;
@@ skipping 29 matching lines @@
 
 /**
  * *Warning*: This is an implementation helper for Model-Driven Views and
  * should not be used in your code.
  *
  * This event is fired whenever a template is instantiated via
  * [Element.createInstance].
  */
 // TODO(rafaelw): This is a hack, and is neccesary for the polyfill
 // because custom elements are not upgraded during clone()
+// TODO(jmesserly): polymer removed this in:
+// https://github.com/Polymer/platform/commit/344ffeaae475babb529403f6608588a0fc73f4e7
 Stream<DocumentFragment> get instanceCreated {
   if (_instanceCreated == null) {
-    _instanceCreated =
-        new StreamController<DocumentFragment>(sync: true);
+    _instanceCreated = new StreamController<DocumentFragment>(sync: true);
   }
   return _instanceCreated.stream;
 }
 
-/**
- * Binds all mustaches recursively starting from the [root] node.
- *
- * Note: this is not an official Model-Driven-Views API; it is intended to
- * support binding the [ShadowRoot]'s content to a model.
- */
-// TODO(jmesserly): this is needed to avoid two <template> nodes when using
-// bindings in a custom element's template. See also:
-// https://github.com/polymer-project/polymer/blob/master/src/bindMDV.js#L68
-// Called from:
-// https://github.com/polymer-project/polymer/blob/master/src/register.js#L99
-void bindModel(Node root, model, [BindingDelegate delegate]) {
-  _addBindings(root, model, delegate);
-}
-
 
 // TODO(jmesserly): investigate if expandos give us enough performance.
 
 // The expando for storing our MDV wrappers.
 //
 // In general, we need state associated with the nodes. Rather than having a
 // bunch of individual expandos, we keep one per node.
 //
 // Aside from the potentially helping performance, it also keeps things simpler
 // if we decide to integrate MDV into the DOM later, and means less code needs
@@ skipping 21 matching lines @@
   } else if (node is Node) {
     wrapper = new _NodeExtension(node);
   } else {
     // TODO(jmesserly): this happens for things like CompoundBinding.
     wrapper = node;
   }
 
   _mdvExpando[node] = wrapper;
   return wrapper;
 }