[MD settings] adding homepage url input

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.
  *
  * Example:
  *
@@ skipping 20 matching lines @@
 
     /**
      * Translated strings used in data binding.
      */
     i18n_: {
       type: Object,
       value: function() {
         return {
           homePageNtp: loadTimeData.getString('homePageNtp'),
           openThisPage: loadTimeData.getString('openThisPage'),
+          onStartupEnterUrl: loadTimeData.getString('onStartupEnterUrl'),
         };
       },
     },
   },
 
   /** @override */
   attached: function() {
     // Query the initial state.
     cr.sendWithCallback('getResetThemeEnabled', undefined,
                         this.setResetThemeEnabled.bind(this));
@@ skipping 10 matching lines @@
   /** @private */
   openThemesGallery_: function() {
     window.open(loadTimeData.getString('themesGalleryUrl'));
   },
 
   /** @private */
   resetTheme_: function() {
     chrome.send('resetTheme');
   },
 });