Update bower.json for Polymer elements and add PRESUBMIT.py

third_party/polymer/v1_0/components/iron-autogrow-textarea/iron-autogrow-textarea.html

 <!--
 @license
 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 -->
 
 <link rel="import" href="../polymer/polymer.html">
+<link rel="import" href="../iron-behaviors/iron-control-state.html">
 <link rel="import" href="../iron-flex-layout/classes/iron-flex-layout.html">
 <link rel="import" href="../iron-validatable-behavior/iron-validatable-behavior.html">
 
 <!--
 `iron-autogrow-textarea` is an element containing a textarea that grows in height as more
 lines of input are entered. Unless an explicit height or the `maxRows` property is set, it will
 never scroll.
 
 Example:
 
@@ skipping 56 matching lines @@
         autofocus$="[[autofocus]]"
         inputmode$="[[inputmode]]"
         name$="[[name]]"
         placeholder$="[[placeholder]]"
         readonly$="[[readonly]]"
         required$="[[required]]"
         rows$="[[rows]]"
         maxlength$="[[maxlength]]"></textarea>
     </div>
   </template>
+</dom-module>
 
 <script>
 
   Polymer({
 
     is: 'iron-autogrow-textarea',
 
     behaviors: [
-      Polymer.IronValidatableBehavior
+      Polymer.IronValidatableBehavior,
+      Polymer.IronControlState
     ],
 
     properties: {
 
       /**
        * Use this property instead of `value` for two-way data binding.
        */
       bindValue: {
         observer: '_bindValueChanged',
         type: String
@@ skipping 147 matching lines @@
       }
       this.tokens = (input && input.value) ? input.value.replace(/&/gm, '&amp;').replace(/"/gm, '&quot;').replace(/'/gm, '&#39;').replace(/</gm, '&lt;').replace(/>/gm, '&gt;').split('\n') : [''];
       return this._constrain(this.tokens);
     },
 
     _updateCached: function() {
       this.$.mirror.innerHTML = this._constrain(this.tokens);
     }
   })
 </script>