Add cr-settings-radio-group wrapper

chrome/browser/resources/settings/appearance_page/appearance_page.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.
 
 
 
 /**
  * 'cr-settings-appearance-page' is the settings page containing appearance
  * settings.
  *
@@ skipping 23 matching lines @@
   },
 
   properties: {
     /**
      * Preferences state.
      */
     prefs: {
       type: Object,
       notify: true,
     },
+
+    /**
+     * Translated strings used in data binding.
+     */
+    i18n_: {
+      type: Object,
+      value: function() {
+        return {
+          homePageNtp: loadTimeData.getString('homePageNtp'),
+          openThisPage: loadTimeData.getString('openThisPage'),
+        };
+      },
+    },
   },
 
   setResetThemeEnabled: function(enabled) {
     this.$.resetTheme.disabled = !enabled;
   },
 
   /** @private */
   openThemesGallery_: function() {
     window.open(loadTimeData.getString('themesGalleryUrl'));
   },
 
   /** @private */
   resetTheme_: function() {
     chrome.send('resetTheme');
   },
 });