Take the Extension Storage API out of experimental.

chrome/test/data/extensions/api_test/settings/split_incognito/background.js

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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 api = chrome.experimental.storage;
+var api = chrome.storage;
 var assertEq = chrome.test.assertEq;
 var inIncognitoContext = chrome.extension.inIncognitoContext;
 
 ['sync', 'local'].forEach(function(namespace) {
   api[namespace].notifications = {};
   api.onChanged.addListener(function(changes, event_namespace) {
     if (event_namespace == namespace) {
       var notifications = api[namespace].notifications;
       Object.keys(changes).forEach(function(key) {
         notifications[key] = changes[key];
@@ skipping 63 matching lines @@
         return;
       }
       action.bind(api[message.namespace])(
           message.isFinalAction ? chrome.test.succeed : next);
     });
   }
   next();
 }
 
 chrome.test.runTests([testEverything]);