diff -r 000000000000 -r 6474c204b198 toolkit/xre/nsNativeAppSupportQt.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/xre/nsNativeAppSupportQt.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,118 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 et sw=2 tw=80: */
+/* 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 <stdlib.h>
+#include <QTimer>
+#include "mozilla/ipc/GeckoChildProcessHost.h"
+#include "nsNativeAppSupportQt.h"
+#include "nsCOMPtr.h"
+#include "nsIObserverService.h"
+#include "mozilla/Services.h"
+
+#ifdef MOZ_ENABLE_QMSYSTEM2
+void
+nsNativeAppSupportQt::activityChanged(MeeGo::QmActivity::Activity activity)
+{
+    nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
+    if (!os)
+        return;
+
+    if (MeeGo::QmActivity::Inactive == activity) {
+        os->NotifyObservers(nullptr, "system-idle", nullptr);
+    } else {
+        os->NotifyObservers(nullptr, "system-active", nullptr);
+    }
+}
+
+void
+nsNativeAppSupportQt::displayStateChanged(MeeGo::QmDisplayState::DisplayState state)
+{
+    nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
+    if (!os)
+        return;
+
+    switch (state) {
+    case MeeGo::QmDisplayState::On:
+        os->NotifyObservers(nullptr, "system-display-on", nullptr);
+        break;
+    case MeeGo::QmDisplayState::Off:
+        os->NotifyObservers(nullptr, "system-display-off", nullptr);
+        break;
+    case MeeGo::QmDisplayState::Dimmed:
+        os->NotifyObservers(nullptr, "system-display-dimmed", nullptr);
+        break;
+    default:
+        NS_WARNING("Unknown display state");
+        break;
+    }
+}
+
+void nsNativeAppSupportQt::deviceModeChanged(MeeGo::QmDeviceMode::DeviceMode mode)
+{
+    nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
+    if (!os)
+        return;
+
+    switch (mode) {
+    case MeeGo::QmDeviceMode::DeviceMode::Normal:
+        os->NotifyObservers(nullptr, "profile-change-net-restore", nullptr);
+        break;
+    case MeeGo::QmDeviceMode::DeviceMode::Flight:
+        os->NotifyObservers(nullptr, "profile-change-net-teardown", nullptr);
+        break;
+    case MeeGo::QmDeviceMode::DeviceMode::Error:
+    default:
+        NS_WARNING("Unknown DeviceMode");
+        break;
+    }
+}
+
+void nsNativeAppSupportQt::RefreshStates()
+{
+  activityChanged(mActivity.get());
+  displayStateChanged(mDisplayState.get());
+  deviceModeChanged(mDeviceMode.getMode());
+}
+#endif
+
+NS_IMETHODIMP
+nsNativeAppSupportQt::Start(bool* aRetVal)
+{
+  NS_ASSERTION(gAppData, "gAppData must not be null.");
+
+#ifdef MOZ_ENABLE_QMSYSTEM2
+  connect(&mActivity, SIGNAL(activityChanged(MeeGo::QmActivity::Activity)), this, SLOT(activityChanged(MeeGo::QmActivity::Activity)));
+  connect(&mDeviceMode, SIGNAL(deviceModeChanged(MeeGo::QmDeviceMode::DeviceMode)), this, SLOT(deviceModeChanged(MeeGo::QmDeviceMode::DeviceMode)));
+  connect(&mDisplayState, SIGNAL(displayStateChanged(MeeGo::QmDisplayState::DisplayState)), this, SLOT(displayStateChanged(MeeGo::QmDisplayState::DisplayState)));
+  // Init states withing next event loop iteration
+  QTimer::singleShot(0, this, SLOT(RefreshStates()));
+#endif
+
+  *aRetVal = true;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNativeAppSupportQt::Stop(bool* aResult)
+{
+  NS_ENSURE_ARG(aResult);
+  *aResult = true;
+
+  return NS_OK;
+}
+
+nsresult
+NS_CreateNativeAppSupport(nsINativeAppSupport** aResult)
+{
+  nsNativeAppSupportBase* native = new nsNativeAppSupportQt();
+  if (!native)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  *aResult = native;
+  NS_ADDREF(*aResult);
+
+  return NS_OK;
+}