chrome.tabs.onUpdated doesn't called with 'loading' twice.

chrome/test/data/extensions/api_test/tabs/on_updated/historyPushState/a.js

Index: chrome/test/data/extensions/api_test/tabs/on_updated/historyPushState/a.js
diff --git a/chrome/test/data/extensions/api_test/tabs/on_updated/internalAnchorNavigated/a.js b/chrome/test/data/extensions/api_test/tabs/on_updated/historyPushState/a.js
similarity index 51%
copy from chrome/test/data/extensions/api_test/tabs/on_updated/internalAnchorNavigated/a.js
copy to chrome/test/data/extensions/api_test/tabs/on_updated/historyPushState/a.js
index 0d7e645c864a60578c321926141d1981a327681a..38c6076edff0ed023a2f7c68e538b3199290f68f 100644
--- a/chrome/test/data/extensions/api_test/tabs/on_updated/internalAnchorNavigated/a.js
+++ b/chrome/test/data/extensions/api_test/tabs/on_updated/historyPushState/a.js
@@ -1,10 +1,10 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2015 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.
 
 window.onload = function() {
-  // Navigate after the onload, so the 'complete' status will fire.
+  // 'load' and 'complete' are fired without URL update.
   setTimeout(function() {
-    location.href = "#b";
+    history.pushState(null, null, "");
   }, 0);
 }