MD Settings: add a <controlled-radio-button>

chrome/browser/resources/settings/controls/controlled_radio_button.js

 // Copyright 2016 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.
 
 Polymer({
-  is: 'controlled-button',
+  is: 'controlled-radio-button',
 
   behaviors: [CrPolicyPrefBehavior, PrefControlBehavior],
 
   properties: {
+    name: {
+      type: String,
+      notify: true,
+    },
+
     /** @private */
     controlled_: {
       type: Boolean,
       computed: 'computeControlled_(pref)',
       reflectToAttribute: true,
     },
   },
 
   /**
-   * @param {!chrome.settingsPrivate.PrefObject} pref
+   * @param {chrome.settingsPrivate.PrefObject} pref
    * @return {boolean} Whether the button is disabled.
    * @private
    */
   computeControlled_: function(pref) {
+    var pref = /** @type {!chrome.settingsPrivate.PrefObject} */(this.pref);
     return this.isPrefPolicyControlled(pref);
   },
 
   /**
+   * @param {boolean} controlled
+   * @param {string} name
+   * @param {chrome.settingsPrivate.PrefObject} pref
+   * @return {boolean}
+   * @private
+   */
+  showIndicator_: function(controlled, name, pref) {
+    return controlled && name == Settings.PrefUtil.prefToString(pref);
+  },
+
+  /**
    * @param {!Event} e
    * @private
    */
   onIndicatorTap_: function(e) {
-    // Disallow <controlled-button on-tap="..."> when controlled.
+    // Disallow <controlled-radio-button on-tap="..."> when controlled.
     e.preventDefault();
     e.stopPropagation();
   },
 });