Take the Extension Storage API out of experimental.

chrome/test/data/extensions/api_test/settings/simple_test/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.
 
 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));
     stage0.call(api);
   });
 }
 
 chrome.test.runTests([
   function getWhenEmpty() {
     function stage0() {
@@ skipping 268 matching lines @@
         'baz': {}
       }, settings);
       this.succeed();
     }
     test(stage0);
   },
 
   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;
 
     function next() {
       api.clear((--maxRequests > 0) ? next : done);
     }
     function done() {
       chrome.test.assertEq(
           "This request exceeds available quota.",
           chrome.extension.lastError.message);
       chrome.test.succeed();
     }
     api.clear(next);
   }
 ]);