Revert "Rename experimental.accessibility to accessibilityPrivate"

chrome/test/data/extensions/api_test/permissions/enabled/background.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.
 
 // All of the calls to chrome.* functions should succeed, since this extension
 // has requested all required permissions.
 
 var pass = chrome.test.callbackPass;
 
 chrome.test.runTests([
+  function experimental() {
+    // Test that use of an experimental API works.
+    // If/when chrome.experimental.accessibility is moved out of
+    // experimental, this test needs to be updated.
+    chrome.tabs.getSelected(null, function(tab) {
+      try {
+        chrome.experimental.accessibility.getAlertsForTab(
+          tab.id, pass(function(alerts) {}));
+      } catch (e) {
+        chrome.test.fail();
+      }
+    });
+  },
+
   function history() {
     try {
       var query = { 'text': '', 'maxResults': 1 };
       chrome.history.search(query, pass(function(results) {}));
     } catch (e) {
       chrome.test.fail();
     }
   },
 
   function bookmarks() {
     try {
       chrome.bookmarks.get("1", pass(function(results) {}));
     } catch (e) {
       chrome.test.fail();
     }
   },
 
   function tabs() {
     try {
       chrome.tabs.getSelected(null, pass(function(results) {}));
     } catch (e) {
       chrome.test.fail();
     }
   }
 ]);