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

chrome/browser/resources/settings/controls/settings_radio_group.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-radio-group` wraps a radio-group and set of radio-buttons that control
  *  a supplied preference.
  *
  * Example:
  *      <settings-radio-group pref="{{prefs.settings.foo}}"
  *          label="Foo Options." buttons="{{fooOptionsList}}">
  *      </settings-radio-group>
  */
 Polymer({
   is: 'settings-radio-group',
 
-  behaviors: [CrPolicyPrefBehavior, PrefControlBehavior],
+  behaviors: [PrefControlBehavior],
 
   properties: {
-    disabled_: {
-      observer: 'disabledChanged_',
-      type: Boolean,
-      value: false,
-    },
-
     /**
      * IronSelectableBehavior selected attribute.
      */
     selected: {
       type: String,
       notify: true,
       observer: 'selectedChanged_'
     },
   },
 
   observers: [
     'prefChanged_(pref.*)',
   ],
 
   /** @private */
   prefChanged_: function() {
     var pref = /** @type {!chrome.settingsPrivate.PrefObject} */(this.pref);
-    this.disabled_ = this.isPrefPolicyControlled(pref);
     this.selected = Settings.PrefUtil.prefToString(pref);
   },
 
   /** @private */
-  disabledChanged_: function() {
-    var radioButtons = this.queryAllEffectiveChildren('paper-radio-button');
-    for (var i = 0; i < radioButtons.length; ++i) {
-      radioButtons[i].disabled = this.disabled_;
-    }
-  },
-
-  /** @private */
   selectedChanged_: function(selected) {
     if (!this.pref)
       return;
     this.set('pref.value',
              Settings.PrefUtil.stringToPrefValue(selected, this.pref));
   },
 });