DOMUI Prefs: Add a deletable item list type, and use it for startup pages.

chrome/browser/resources/options/add_startup_page_overlay.js

 // Copyright (c) 2010 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;
   const ListSingleSelectionModel = cr.ui.ListSingleSelectionModel;
 
   /**
@@ skipping 16 matching lines @@
      * Initializes the page.
      */
     initializePage: function() {
       OptionsPage.prototype.initializePage.call(this);
 
       var self = this;
       var addForm = $('addStartupPageForm');
       addForm.onreset = this.dismissOverlay_.bind(this);
       addForm.onsubmit =  function(e) {
         var urlField = $('addStartupPageURL');
-        BrowserOptions.addStartupPage(urlField.value);
+        StartupPageManager.addStartupPage(urlField.value);
 
         self.dismissOverlay_();
         return false;
       };
       $('addStartupPageURL').oninput = this.updateAddButtonState_.bind(this);
       $('addStartupPageURL').onkeydown = function(e) {
         if (e.keyCode == 27)  // Esc
           $('addStartupPageForm').reset();
       };
 
@@ skipping 71 matching lines @@
   AddStartupPageOverlay.setInputFieldValue = function(url) {
     AddStartupPageOverlay.getInstance().setInputFieldValue_(url);
   };
 
   // Export
   return {
     AddStartupPageOverlay: AddStartupPageOverlay
   };
 
 });