diff -r 000000000000 -r 6474c204b198 hal/HalWakeLock.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hal/HalWakeLock.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,26 @@
+/* -*- 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 __HAL_WAKELOCK_H_
+#define __HAL_WAKELOCK_H_
+
+namespace mozilla {
+namespace hal {
+
+enum WakeLockState {
+  WAKE_LOCK_STATE_UNLOCKED,
+  WAKE_LOCK_STATE_HIDDEN,
+  WAKE_LOCK_STATE_VISIBLE
+};
+
+/**
+ * Return the wake lock state according to the numbers.
+ */
+WakeLockState ComputeWakeLockState(int aNumLocks, int aNumHidden);
+
+} // hal
+} // mozilla
+
+#endif /* __HAL_WAKELOCK_H_ */