Update references to the extension messaging APIs to point to the "runtime"

chrome/test/data/extensions/context_menus/patterns/test.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.
 
 var make_browsertest_proceed = function() {
-  if (!chrome.extension.lastError) {
+  if (!chrome.runtime.lastError) {
     chrome.test.sendMessage("created items");
   }
 };
 
 var patterns = ["http://*.google.com/*", "https://*.google.com/*"];
 
 window.onload = function() {
   // Create one item that does have a documentUrlPattern.
   var properties1 = {
     "title": "test_item1", "documentUrlPatterns": patterns
   };
   chrome.contextMenus.create(properties1);
 
   // Create an item that initially doesn't have a documentUrlPattern, then
   // update it, and then proceed with the c++ code in the browser test.
   var properties2 = { "title": "test_item2" };
 
   var id2;
   id2 = chrome.contextMenus.create(properties2,
                                                 function() {
     var update_properties = { "documentUrlPatterns": patterns };
     chrome.contextMenus.update(id2, update_properties,
                                make_browsertest_proceed);
   });
 };