diff -r 000000000000 -r 6474c204b198 widget/windows/winrt/nsWinMetroUtils.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/windows/winrt/nsWinMetroUtils.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 4; 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/. */
+
+#pragma once
+
+#include "nsIWinMetroUtils.h"
+#include "nsString.h"
+
+namespace mozilla {
+namespace widget {
+
+class nsWinMetroUtils : public nsIWinMetroUtils
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIWINMETROUTILS
+
+  nsWinMetroUtils();
+  virtual ~nsWinMetroUtils();
+
+  static bool sUpdatePending;
+};
+
+} // widget
+} // mozilla