chrome://settings - Provide method for pages to prevent themselves being shown.

chrome/browser/resources/options/browser_options.js

 // Copyright (c) 2011 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.define('options', function() {
   const OptionsPage = options.OptionsPage;
   const ArrayDataModel = cr.ui.ArrayDataModel;
 
   //
   // BrowserOptions class
@@ skipping 142 matching lines @@
           defaultIndex = i;
         engineSelect.appendChild(option);
       }
       if (defaultIndex >= 0)
         engineSelect.selectedIndex = defaultIndex;
     },
 
     /**
      * Returns true if the custom startup page control block should
      * be enabled.
-     * @private
      * @returns {boolean} Whether the startup page controls should be
      *     enabled.
      */
-    shouldEnableCustomStartupPageControls_: function(pages) {
+    shouldEnableCustomStartupPageControls: function(pages) {
       return $('startupShowPagesButton').checked;
     },
 
     /**
      * Updates the startup pages list with the given entries.
      * @private
      * @param {Array} pages List of startup pages.
      */
     updateStartupPages_: function(pages) {
       $('startupPagesList').dataModel = new ArrayDataModel(pages);
@@ skipping 151 matching lines @@
               !(this.isHomepageURLNewTabPageURL_() &&
                 !this.homepage_is_newtabpage_pref_.managed));
     },
 
     /**
      * Sets the enabled state of the custom startup page list controls
      * based on the current startup radio button selection.
      * @private
      */
     updateCustomStartupPageControlStates_: function() {
-      var disable = !this.shouldEnableCustomStartupPageControls_();
+      var disable = !this.shouldEnableCustomStartupPageControls();
       $('startupPagesList').disabled = disable;
       $('startupUseCurrentButton').disabled = disable;
       $('startupAddButton').disabled = disable;
     },
 
     /**
      * Set the default search engine based on the popup selection.
      */
     setDefaultSearchEngine: function() {
       var engineSelect = $('defaultSearchEngine');
@@ skipping 35 matching lines @@
   BrowserOptions.addStartupPage = function(url) {
     BrowserOptions.getInstance().addStartupPage_(url);
   };
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 
 });