MD Settings: Make PolicyControllable behavior for isPolicyControlled()

chrome/browser/resources/settings/checkbox/checkbox.js

 // Copyright 2015 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.
 
 /**
  * @fileoverview
  * `cr-settings-checkbox` is a checkbox that controls a supplied preference.
  *
  * Example:
  *      <cr-settings-checkbox pref="{{prefs.settings.enableFoo}}"
  *          label="Enable foo setting." subLabel="(bar also)">
  *      </cr-settings-checkbox>
  *
  * @element cr-settings-checkbox
  */
 Polymer({
   is: 'cr-settings-checkbox',
 
+  behaviors: [PolicyControllable],
+
   properties: {
     /**
      * The boolean preference object to control.
      * @type {?chrome.settingsPrivate.PrefObject}
      */
     pref: {
       type: Object,
       notify: true,
     },
 
@@ skipping 64 matching lines @@
     return this.inverted ? !value : !!value;
   },
 
   /**
    * @param {boolean} disabled
    * @param {?chrome.settingsPrivate.PrefObject} pref
    * @return {boolean} Whether the checkbox should be disabled.
    * @private
    */
   checkboxDisabled_: function(disabled, pref) {
-    return disabled || (!!pref &&
-                        pref.policyEnforcement ==
-                            chrome.settingsPrivate.PolicyEnforcement.ENFORCED);
+    return disabled || this.isPolicyControlled(pref);
   },
 });