Move topSites API out of experimental

chrome/common/extensions/docs/examples/api/topsites/magic8ball/newTab.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.
 
 function $(id) {
   return document.getElementById(id);
 }
 
 function thumbnailsGotten(data) {
   var eightBallWindow = $('mostVisitedThumb');
   var rand = Math.floor(Math.random() * data.length);
-  eightBallWindow.style.backgroundImage =
-      'url(chrome://thumb/' + data[rand].url + ')';
   eightBallWindow.href = data[rand].url;
-
-  var span = eightBallWindow.querySelector('span');
-  span.textContent = data[rand].title;
-  span.style.backgroundImage = 'url(chrome://favicon/' + data[rand].url + ')';
+  eightBallWindow.textContent = data[rand].title;
+  eightBallWindow.style.backgroundImage = 'url(chrome://favicon/' +
+      data[rand].url + ')';
 }
 
 window.onload = function() {
-  chrome.experimental.topSites.get(thumbnailsGotten);
+  chrome.topSites.get(thumbnailsGotten);
 }