Continuously update status in the buildbot extension popup window

chrome/common/extensions/docs/examples/extensions/buildbot/prefs.js

Index: chrome/common/extensions/docs/examples/extensions/buildbot/prefs.js
diff --git a/chrome/common/extensions/docs/examples/extensions/buildbot/prefs.js b/chrome/common/extensions/docs/examples/extensions/buildbot/prefs.js
index d8df783a218cc9e4067ce0c6993f2ecee8b31c0c..3071be347d53dd470e3d82fa0aabb136955119e2 100644
--- a/chrome/common/extensions/docs/examples/extensions/buildbot/prefs.js
+++ b/chrome/common/extensions/docs/examples/extensions/buildbot/prefs.js
@@ -2,12 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-function Prefs() {
+(function() {
+
+window.buildbot = window.buildbot || {};
+
+buildbot.PrefStore = function() {
   this.defaults_ = {prefs: {use_notifications: false,
-                            try_job_username: ""}};
-}
+                            try_job_username: null}};
+};
 
-Prefs.prototype = {
+buildbot.PrefStore.prototype = {
   get_: function(key, callback) {
     chrome.storage.sync.get(this.defaults_,
         function (storage) {
@@ -39,3 +43,5 @@ Prefs.prototype = {
     this.set_("try_job_username", try_job_username);
   }
 };
+
+})();