Take the Extension Storage API out of experimental.

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

Index: chrome/test/data/extensions/api_test/settings/simple_test/background.js
diff --git a/chrome/test/data/extensions/api_test/settings/simple_test/background.js b/chrome/test/data/extensions/api_test/settings/simple_test/background.js
index 7ae05e7fad4f67df246b442b71a52be157a8a195..85f5e628128985966e8f47fbcd53035ee9a0eee7 100644
--- a/chrome/test/data/extensions/api_test/settings/simple_test/background.js
+++ b/chrome/test/data/extensions/api_test/settings/simple_test/background.js
@@ -1,11 +1,11 @@
-// 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.
 
 function test(stage0) {
   var apis = [
-      chrome.experimental.storage.sync,
-      chrome.experimental.storage.local
+    chrome.storage.sync,
+    chrome.storage.local
   ];
   apis.forEach(function(api) {
     api.succeed = chrome.test.callbackPass(api.clear.bind(api));
@@ -294,7 +294,7 @@ chrome.test.runTests([
   function throttling() {
     // We can only really test one of the namespaces since they will all get
     // throttled together.
-    var api = chrome.experimental.storage.sync;
+    var api = chrome.storage.sync;
 
     // Should get throttled after 1000 calls.
     var maxRequests = 1001;