Move context menu module out of experimental.

chrome/test/data/extensions/context_menus/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.
 
 // Checks that there is only one window and one tab, and calls back |callback|
 // with its id (or -1 if there is more than 1 window or more than 1 tab).
 function getCurrentSingleTabId(callback) {
   chrome.windows.getAll({"populate":true}, function(windows) {
     if (windows.length != 1 || windows[0].tabs.length != 1) {
       callback(-1);
     } else {
       callback(windows[0].tabs[0].id);
     }
   });
 }
 
 function navigateCurrentTab(url) {
   getCurrentSingleTabId(function(tabid) {
     chrome.tabs.update(tabid, {"url": url});
   });
 }
 
 function onclick(info) {
   navigateCurrentTab(chrome.extension.getURL("test2.html"));
 }
 
 window.onload = function() {
-  chrome.experimental.contextMenus.create({"title":"Extension Item 1",
-                                          "onclick": onclick}, function() {
+  chrome.contextMenus.create({"title":"Extension Item 1",
+                              "onclick": onclick}, function() {
     if (!chrome.extension.lastError) {
       navigateCurrentTab(chrome.extension.getURL("test.html"));
     }
   });
 };