Fix an error where the onchange() only worked due to scoping rules.

chrome/browser/resources/options/website_settings.js

 // Copyright 2014 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 */ var Page = cr.ui.pageManager.Page;
   /** @const */ var PageManager = cr.ui.pageManager.PageManager;
   /** @const */ var ArrayDataModel = cr.ui.ArrayDataModel;
 
   /////////////////////////////////////////////////////////////////////////////
@@ skipping 21 matching lines @@
      */
     originList_: null,
 
     /** @override */
     initializePage: function() {
       Page.prototype.initializePage.call(this);
 
       $('website-settings-overlay-confirm').onclick =
           PageManager.closeOverlay.bind(PageManager);
 
-      $('resourceType').onchange = function() {
+      $('resourceType').onchange = function(event) {
         var target = event.target;
         assert(target.tagName == 'SELECT');
         if (target.value == 'storage')
           chrome.send('updateLocalStorage');
         else if (target.value == 'battery')
           chrome.send('updateBatteryUsage');
         else
           chrome.send('updateOrigins', [target.value]);
       };
 
@@ skipping 75 matching lines @@
 
   WebsiteSettingsManager.showEditPage = function(url) {
     WebsiteSettingsEditor.getInstance().populatePage(url);
   };
 
   // Export
   return {
     WebsiteSettingsManager: WebsiteSettingsManager
   };
 });