diff -r 000000000000 -r 6474c204b198 widget/windows/winrt/WakeLockListener.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/windows/winrt/WakeLockListener.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,25 @@
+/* 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/. */
+
+#include "mozwrlbase.h"
+
+#include "nscore.h"
+#include "nsString.h"
+#include "nsIDOMWakeLockListener.h"
+
+#include <windows.system.display.h>
+
+/*
+ * A wake lock is used by dom to prevent the device from turning off the
+ * screen when the user is viewing certain types of content, like video.
+ */
+class WakeLockListener :
+  public nsIDOMMozWakeLockListener {
+public:
+  NS_DECL_ISUPPORTS;
+  NS_DECL_NSIDOMMOZWAKELOCKLISTENER;
+
+private:
+  Microsoft::WRL::ComPtr<ABI::Windows::System::Display::IDisplayRequest> mDisplayRequest;
+};