MD Settings: disable <paper-radio-button>s inside of a <settings-radio-group> when controlled

chrome/test/data/webui/settings/cr_settings_browsertest.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 Runs the Polymer Settings tests. */
 
 /** @const {string} Path to source root. */
 var ROOT_PATH = '../../../../../';
 
 // Polymer BrowserTest fixture.
@@ skipping 538 matching lines @@
   extraLibraries: CrSettingsBrowserTest.prototype.extraLibraries.concat([
     'fake_language_settings_private.js',
     'fake_settings_private.js',
     'languages_page_tests.js',
   ]),
 };
 
 TEST_F('CrSettingsLanguagesPageTest', 'LanguagesPage', function() {
   mocha.run();
 });
+
+function CrSettingsRadioGroupTest() {}
+
+CrSettingsRadioGroupTest.prototype = {
+  __proto__: CrSettingsBrowserTest.prototype,
+
+  /** @override */
+  browsePreload: 'chrome://md-settings/controls/settings_radio_group.html',
+
+  /** @override */
+  extraLibraries: PolymerTest.getLibraries(ROOT_PATH).concat([
+    'radio_group_tests.js',
+  ]),
+};
+
+TEST_F('CrSettingsRadioGroupTest', 'All', function() {
+  mocha.run();
+});