web-ui settings: Fix incorrect handling for the Import dialog when no browser...

chrome/browser/resources/options/import_data_overlay.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() {
   var OptionsPage = options.OptionsPage;
 
   /**
    * ImportDataOverlay class
    * Encapsulated handling of the 'Import Data' overlay page.
@@ skipping 83 matching lines @@
       checkbox.disabled = !enabled;
       checkbox.checked = enabled;
     },
 
     /**
      * Update the enabled and checked states of all checkboxes.
      * @private
      */
     updateCheckboxes_: function() {
       var index = $('import-browsers').selectedIndex;
-      var browserProfile = ImportDataOverlay.browserProfiles[index];
+      var browserProfile;
+      if (this.browserProfiles.length > index)
+        browserProfile = this.browserProfiles[index];
       var importOptions = ['history', 'favorites', 'passwords', 'search'];
       for (var i = 0; i < importOptions.length; i++) {
         var checkbox = $('import-' + importOptions[i]);
-        this.setUpCheckboxState_(checkbox, browserProfile[importOptions[i]]);
+        this.setUpCheckboxState_(checkbox,
+            browserProfile ? browserProfile[importOptions[i]] : false);
       }
     },
 
     /**
      * Update the supported browsers popup with given entries.
      * @param {array} browsers List of supported browsers name.
      * @private
      */
     updateSupportedBrowsers_: function(browsers) {
-      ImportDataOverlay.browserProfiles = browsers;
+      this.browserProfiles = browsers;
       var browserSelect = $('import-browsers');
       browserSelect.remove(0);  // Remove the 'Loading...' option.
       browserSelect.textContent = '';
       var browserCount = browsers.length;
 
       if (browserCount == 0) {
         var option = new Option(templateData.noProfileFound, 0);
         browserSelect.appendChild(option);
 
         this.setControlsSensitive_(false);
@@ skipping 44 matching lines @@
   ImportDataOverlay.dismiss = function() {
     ImportDataOverlay.setImportingState(false);
     OptionsPage.closeOverlay();
   };
 
   // Export
   return {
     ImportDataOverlay: ImportDataOverlay
   };
 });