diff -r 000000000000 -r 6474c204b198 dom/power/PowerManagerService.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/power/PowerManagerService.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,80 @@
+/* -*- 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 mozilla_dom_power_PowerManagerService_h
+#define mozilla_dom_power_PowerManagerService_h
+
+#include "nsCOMPtr.h"
+#include "nsDataHashtable.h"
+#include "nsHashKeys.h"
+#include "nsTArray.h"
+#include "nsIPowerManagerService.h"
+#include "mozilla/Observer.h"
+#include "Types.h"
+#include "mozilla/StaticPtr.h"
+#include "mozilla/dom/WakeLock.h"
+
+namespace mozilla {
+namespace dom {
+
+class ContentParent;
+
+namespace power {
+
+class PowerManagerService
+  : public nsIPowerManagerService
+  , public WakeLockObserver
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIPOWERMANAGERSERVICE
+
+  static already_AddRefed<PowerManagerService> GetInstance();
+
+  void Init();
+
+  // Implement WakeLockObserver
+  void Notify(const hal::WakeLockInformation& aWakeLockInfo);
+
+  /**
+   * Acquire a wake lock on behalf of a given process (aContentParent).
+   *
+   * This method stands in contrast to nsIPowerManagerService::NewWakeLock,
+   * which acquires a wake lock on behalf of the /current/ process.
+   *
+   * NewWakeLockOnBehalfOfProcess is different from NewWakeLock in that
+   *
+   *  - The wake lock unlocks itself if the /given/ process dies, and
+   *  - The /given/ process shows up in WakeLockInfo::lockingProcesses.
+   *
+   */
+  already_AddRefed<WakeLock>
+  NewWakeLockOnBehalfOfProcess(const nsAString& aTopic,
+                               ContentParent* aContentParent);
+
+  already_AddRefed<WakeLock>
+  NewWakeLock(const nsAString& aTopic, nsIDOMWindow* aWindow,
+              mozilla::ErrorResult& aRv);
+
+private:
+
+  ~PowerManagerService();
+
+  void ComputeWakeLockState(const hal::WakeLockInformation& aWakeLockInfo,
+                            nsAString &aState);
+
+  void SyncProfile();
+
+  static StaticRefPtr<PowerManagerService> sSingleton;
+
+  nsTArray<nsCOMPtr<nsIDOMMozWakeLockListener> > mWakeLockListeners;
+  
+  int32_t mWatchdogTimeoutSecs;
+};
+
+} // namespace power
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_power_PowerManagerService_h