diff -r 000000000000 -r 6474c204b198 widget/windows/WinTaskbar.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/windows/WinTaskbar.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+/* vim: se cin sw=2 ts=2 et : */
+/* -*- 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 __WinTaskbar_h__
+#define __WinTaskbar_h__
+
+#include <windows.h>
+#include <shobjidl.h>
+#undef LogSeverity // SetupAPI.h #defines this as DWORD
+#include "nsIWinTaskbar.h"
+#include "mozilla/Attributes.h"
+
+namespace mozilla {
+namespace widget {
+
+class WinTaskbar MOZ_FINAL : public nsIWinTaskbar
+{
+public: 
+  WinTaskbar();
+  ~WinTaskbar();
+
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIWINTASKBAR
+
+  // Registers the global app user model id for the instance.
+  // See comments in WinTaskbar.cpp for more information.
+  static bool RegisterAppUserModelID();
+  static bool GetAppUserModelID(nsAString & aDefaultGroupId);
+
+private:
+  bool Initialize();
+
+  typedef HRESULT (WINAPI * SetCurrentProcessExplicitAppUserModelIDPtr)(PCWSTR AppID);
+  ITaskbarList4 *mTaskbar;
+};
+
+} // namespace widget
+} // namespace mozilla
+
+#endif /* __WinTaskbar_h__ */
+