Remove Element#attributes.

sky/framework/sky-element/TemplateBinding.sky

 <!--
 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 -->
 <link rel="import" href="observe.sky" as="observe" />
 
 <script>
 Node.prototype.bind = function(name, observable, oneTime) {
   var self = this;
@@ skipping 521 matching lines @@
 
 function parseWithDefault(el, name, prepareBindingFn) {
   var v = el.getAttribute(name);
   return parseMustaches(v == '' ? '{{}}' : v, name, el, prepareBindingFn);
 }
 
 function parseAttributeBindings(element, prepareBindingFn) {
   var bindings = [];
   var ifFound = false;
   var bindFound = false;
+  var attributes = element.getAttributes();
 
-  for (var i = 0; i < element.attributes.length; i++) {
-    var attr = element.attributes[i];
+  for (var i = 0; i < attributes.length; i++) {
+    var attr = attributes[i];
     var name = attr.name;
     var value = attr.value;
 
     if (isTemplate(element) &&
         (name === IF || name === BIND || name === REPEAT)) {
       continue;
     }
 
     var tokens = parseMustaches(value, name, element,
                                 prepareBindingFn);
@@ skipping 439 matching lines @@
       this.closeInstanceBindings(this.instances[i]);
     }
 
     this.instances.length = 0;
     this.closeDeps();
     this.templateElement_.iterator_ = undefined;
     this.closed = true;
   }
 };
 </script>