diff -r 000000000000 -r 6474c204b198 dom/time/TimeChangeObserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/time/TimeChangeObserver.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _mozilla_time_change_observer_h_
+#define _mozilla_time_change_observer_h_
+
+#include "nscore.h"
+
+class nsPIDOMWindow;
+
+namespace mozilla {
+namespace time {
+
+nsresult AddWindowListener(nsPIDOMWindow* aWindow);
+nsresult RemoveWindowListener(nsPIDOMWindow* aWindow);
+
+} // namespace time
+} // namespace mozilla
+
+#endif //_mozilla_time_change_observer_h_