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

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

Index: chrome/test/data/extensions/api_test/tabs/on_updated/historyPushStateUpdateUrl/a.js
diff --git a/media/base/video_capturer_source.cc b/chrome/test/data/extensions/api_test/tabs/on_updated/historyPushStateUpdateUrl/a.js
similarity index 52%
copy from media/base/video_capturer_source.cc
copy to chrome/test/data/extensions/api_test/tabs/on_updated/historyPushStateUpdateUrl/a.js
index c1ebbe1dbff339455a2ef2e9b09efc95edfe79c1..22c5c48ab2fdeb194a1ef7b5d9731fba37e6dac7 100644
--- a/media/base/video_capturer_source.cc
+++ b/chrome/test/data/extensions/api_test/tabs/on_updated/historyPushStateUpdateUrl/a.js
@@ -2,10 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "media/base/video_capturer_source.h"
-
-namespace media {
-
-VideoCapturerSource::~VideoCapturerSource() {}
-
-}  // namespace media
+window.onload = function() {
+  // 'load' status is fired with a updated URL.
+  setTimeout(function() {
+    history.pushState(null, null, "#a");
+  }, 0);
+}