diff -r 000000000000 -r 6474c204b198 widget/windows/winrt/MetroAppShell.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/windows/winrt/MetroAppShell.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,44 @@
+/* -*- 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 "nsBaseAppShell.h"
+#include <windows.h>
+#include "nsWindowsHelpers.h"
+#include "nsIObserver.h"
+
+class MetroAppShell : public nsBaseAppShell
+{
+public:
+  NS_DECL_NSIOBSERVER
+
+  MetroAppShell() :
+    mEventWnd(nullptr),
+    mPowerRequestCount(0)
+  {
+  }
+
+  nsresult Init();
+  void DoProcessMoreGeckoEvents();
+  void NativeCallback();
+
+  static LRESULT CALLBACK EventWindowProc(HWND, UINT, WPARAM, LPARAM);
+  static bool ProcessOneNativeEventIfPresent();
+  static void MarkEventQueueForPurge();
+  static void InputEventsDispatched();
+
+protected:
+  NS_IMETHOD Run();
+
+  virtual void ScheduleNativeEventCallback();
+  virtual bool ProcessNextNativeEvent(bool mayWait);
+  static void DispatchAllGeckoEvents();
+  virtual ~MetroAppShell();
+
+  HWND mEventWnd;
+  nsAutoHandle mPowerRequest;
+  ULONG mPowerRequestCount;
+};