diff -r 000000000000 -r 6474c204b198 dom/power/PowerManager.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/power/PowerManager.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,209 @@
+/* -*- 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/. */
+
+#include "mozilla/dom/PowerManager.h"
+
+#include "mozilla/Hal.h"
+#include "WakeLock.h"
+#include "nsDOMClassInfoID.h"
+#include "nsIDOMWakeLockListener.h"
+#include "nsIDocument.h"
+#include "nsIPermissionManager.h"
+#include "nsIPowerManagerService.h"
+#include "nsIPrincipal.h"
+#include "nsPIDOMWindow.h"
+#include "nsServiceManagerUtils.h"
+#include "nsError.h"
+#include "mozilla/dom/MozPowerManagerBinding.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PowerManager)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+  NS_INTERFACE_MAP_ENTRY(nsIDOMMozWakeLockListener)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_2(PowerManager, mListeners, mWindow)
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(PowerManager)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(PowerManager)
+
+/* virtual */ JSObject*
+PowerManager::WrapObject(JSContext* aCx)
+{
+  return MozPowerManagerBinding::Wrap(aCx, this);
+}
+
+nsresult
+PowerManager::Init(nsIDOMWindow *aWindow)
+{
+  mWindow = aWindow;
+
+  nsCOMPtr<nsIPowerManagerService> pmService =
+    do_GetService(POWERMANAGERSERVICE_CONTRACTID);
+  NS_ENSURE_STATE(pmService);
+
+  // Add ourself to the global notification list.
+  pmService->AddWakeLockListener(this);
+  return NS_OK;
+}
+
+nsresult
+PowerManager::Shutdown()
+{
+  nsCOMPtr<nsIPowerManagerService> pmService =
+    do_GetService(POWERMANAGERSERVICE_CONTRACTID);
+  NS_ENSURE_STATE(pmService);
+
+  // Remove ourself from the global notification list.
+  pmService->RemoveWakeLockListener(this);
+  return NS_OK;
+}
+
+void
+PowerManager::Reboot(ErrorResult& aRv)
+{
+  nsCOMPtr<nsIPowerManagerService> pmService =
+    do_GetService(POWERMANAGERSERVICE_CONTRACTID);
+  if (pmService) {
+    pmService->Reboot();
+  } else {
+    aRv.Throw(NS_ERROR_UNEXPECTED);
+  }
+}
+
+void
+PowerManager::FactoryReset()
+{
+  hal::FactoryReset();
+}
+
+void
+PowerManager::PowerOff(ErrorResult& aRv)
+{
+  nsCOMPtr<nsIPowerManagerService> pmService =
+    do_GetService(POWERMANAGERSERVICE_CONTRACTID);
+  if (pmService) {
+    pmService->PowerOff();
+  } else {
+    aRv.Throw(NS_ERROR_UNEXPECTED);
+  }
+}
+
+void
+PowerManager::AddWakeLockListener(nsIDOMMozWakeLockListener *aListener)
+{
+  if (!mListeners.Contains(aListener)) {
+    mListeners.AppendElement(aListener);
+  }
+}
+
+void
+PowerManager::RemoveWakeLockListener(nsIDOMMozWakeLockListener *aListener)
+{
+  mListeners.RemoveElement(aListener);
+}
+
+void
+PowerManager::GetWakeLockState(const nsAString& aTopic,
+                               nsAString& aState,
+                               ErrorResult& aRv)
+{
+  nsCOMPtr<nsIPowerManagerService> pmService =
+    do_GetService(POWERMANAGERSERVICE_CONTRACTID);
+  if (pmService) {
+    aRv = pmService->GetWakeLockState(aTopic, aState);
+  } else {
+    aRv.Throw(NS_ERROR_UNEXPECTED);
+  }
+}
+
+NS_IMETHODIMP
+PowerManager::Callback(const nsAString &aTopic, const nsAString &aState)
+{
+  /**
+   * We maintain a local listener list instead of using the global
+   * list so that when the window is destroyed we don't have to
+   * cleanup the mess.
+   * Copy the listeners list before we walk through the callbacks
+   * because the callbacks may install new listeners. We expect no
+   * more than one listener per window, so it shouldn't be too long.
+   */
+  nsAutoTArray<nsCOMPtr<nsIDOMMozWakeLockListener>, 2> listeners(mListeners);
+  for (uint32_t i = 0; i < listeners.Length(); ++i) {
+    listeners[i]->Callback(aTopic, aState);
+  }
+
+  return NS_OK;
+}
+
+bool
+PowerManager::ScreenEnabled()
+{
+  return hal::GetScreenEnabled();
+}
+
+void
+PowerManager::SetScreenEnabled(bool aEnabled)
+{
+  hal::SetScreenEnabled(aEnabled);
+}
+
+double
+PowerManager::ScreenBrightness()
+{
+  return hal::GetScreenBrightness();
+}
+
+void
+PowerManager::SetScreenBrightness(double aBrightness, ErrorResult& aRv)
+{
+  if (0 <= aBrightness && aBrightness <= 1) {
+    hal::SetScreenBrightness(aBrightness);
+  } else {
+    aRv.Throw(NS_ERROR_INVALID_ARG);
+  }
+}
+
+bool
+PowerManager::CpuSleepAllowed()
+{
+  return hal::GetCpuSleepAllowed();
+}
+
+void
+PowerManager::SetCpuSleepAllowed(bool aAllowed)
+{
+  hal::SetCpuSleepAllowed(aAllowed);
+}
+
+bool
+PowerManager::CheckPermission(nsPIDOMWindow* aWindow)
+{
+  nsCOMPtr<nsIPermissionManager> permMgr =
+    do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
+  NS_ENSURE_TRUE(permMgr, false);
+
+  uint32_t permission = nsIPermissionManager::DENY_ACTION;
+  permMgr->TestPermissionFromWindow(aWindow, "power", &permission);
+
+  return permission == nsIPermissionManager::ALLOW_ACTION;
+}
+
+already_AddRefed<PowerManager>
+PowerManager::CreateInstance(nsPIDOMWindow* aWindow)
+{
+  nsRefPtr<PowerManager> powerManager = new PowerManager();
+  if (NS_FAILED(powerManager->Init(aWindow))) {
+    powerManager = nullptr;
+  }
+
+  return powerManager.forget();
+}
+
+} // dom
+} // mozilla