diff -r 000000000000 -r 6474c204b198 dom/power/Types.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/power/Types.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+/* -*- Mode: C++; tab-width: 40; 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_dom_power_Types_h
+#define mozilla_dom_power_Types_h
+
+namespace mozilla {
+namespace hal {
+class WakeLockInformation;
+} // namespace hal
+
+template <class T>
+class Observer;
+
+typedef Observer<hal::WakeLockInformation> WakeLockObserver;
+
+} // namespace mozilla
+
+#endif // mozilla_dom_power_Types_h
+