The PolicyTable decorates <table> so it needs to extend HTMLTableElement

chrome/browser/resources/policy.js

 // Copyright (c) 2013 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.
 cr.define('policy', function() {
 
   /**
    * A hack to check if we are displaying the mobile version of this page by
    * checking if the first column is hidden.
    * @return {boolean} True if this is the mobile version.
    */
   var isMobilePage = function() {
     return document.defaultView.getComputedStyle(document.querySelector(
         '.scope-column')).display == 'none';
-  }
+  };
 
   /**
    * A box that shows the status of cloud policy for a device or user.
    * @constructor
    * @extends {HTMLFieldSetElement}
    */
   var StatusBox = cr.ui.define(function() {
     var node = $('status-box-template').cloneNode(true);
     node.removeAttribute('id');
     return node;
@@ skipping 175 matching lines @@
      */
     toggleExpandedValue_: function() {
       this.classList.toggle('show-overflowed-value');
       this.updateToggleExpandedValueText_();
     },
   };
 
   /**
    * A table of policies and their values.
    * @constructor
-   * @extends {HTMLTableSectionElement}
+   * @extends {HTMLTableElement}
    */
   var PolicyTable = cr.ui.define('tbody');
 
   PolicyTable.prototype = {
     // Set up the prototype chain.
-    __proto__: HTMLTableSectionElement.prototype,
+    __proto__: HTMLTableElement.prototype,
 
     /**
      * Initialization function for the cr.ui framework.
      */
     decorate: function() {
       this.policies_ = {};
       this.filterPattern_ = '';
       window.addEventListener('resize', this.checkOverflow_.bind(this));
     },
 
@@ skipping 323 matching lines @@
   return {
     Page: Page
   };
 });
 
 // Have the main initialization function be called when the page finishes
 // loading.
 document.addEventListener(
     'DOMContentLoaded',
     policy.Page.getInstance().initialize.bind(policy.Page.getInstance()));