diff -r 000000000000 -r 6474c204b198 toolkit/components/alerts/nsAlertsService.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/alerts/nsAlertsService.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,169 @@
+/* -*- 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/ContentChild.h"
+#include "mozilla/dom/PermissionMessageUtils.h"
+#include "nsXULAppAPI.h"
+
+#include "nsAlertsService.h"
+
+#ifdef MOZ_WIDGET_ANDROID
+#include "AndroidBridge.h"
+using namespace mozilla::widget::android;
+#else
+
+#include "nsXPCOM.h"
+#include "nsIServiceManager.h"
+#include "nsIDOMWindow.h"
+#include "nsPromiseFlatString.h"
+#include "nsToolkitCompsCID.h"
+
+#endif // !MOZ_WIDGET_ANDROID
+
+using namespace mozilla;
+
+using mozilla::dom::ContentChild;
+
+NS_IMPL_ISUPPORTS(nsAlertsService, nsIAlertsService, nsIAlertsProgressListener)
+
+nsAlertsService::nsAlertsService()
+{
+}
+
+nsAlertsService::~nsAlertsService()
+{}
+
+bool nsAlertsService::ShouldShowAlert()
+{
+  bool result = true;
+
+#ifdef XP_WIN
+  HMODULE shellDLL = ::LoadLibraryW(L"shell32.dll");
+  if (!shellDLL)
+    return result;
+
+  SHQueryUserNotificationStatePtr pSHQueryUserNotificationState =
+    (SHQueryUserNotificationStatePtr) ::GetProcAddress(shellDLL, "SHQueryUserNotificationState");
+
+  if (pSHQueryUserNotificationState) {
+    MOZ_QUERY_USER_NOTIFICATION_STATE qstate;
+    if (SUCCEEDED(pSHQueryUserNotificationState(&qstate))) {
+      if (qstate != QUNS_ACCEPTS_NOTIFICATIONS) {
+         result = false;
+      }
+    }
+  }
+
+  ::FreeLibrary(shellDLL);
+#endif
+
+  return result;
+}
+
+NS_IMETHODIMP nsAlertsService::ShowAlertNotification(const nsAString & aImageUrl, const nsAString & aAlertTitle, 
+                                                     const nsAString & aAlertText, bool aAlertTextClickable,
+                                                     const nsAString & aAlertCookie,
+                                                     nsIObserver * aAlertListener,
+                                                     const nsAString & aAlertName,
+                                                     const nsAString & aBidi,
+                                                     const nsAString & aLang,
+                                                     nsIPrincipal * aPrincipal)
+{
+  if (XRE_GetProcessType() == GeckoProcessType_Content) {
+    ContentChild* cpc = ContentChild::GetSingleton();
+
+    if (aAlertListener)
+      cpc->AddRemoteAlertObserver(PromiseFlatString(aAlertCookie), aAlertListener);
+
+    cpc->SendShowAlertNotification(PromiseFlatString(aImageUrl),
+                                   PromiseFlatString(aAlertTitle),
+                                   PromiseFlatString(aAlertText),
+                                   aAlertTextClickable,
+                                   PromiseFlatString(aAlertCookie),
+                                   PromiseFlatString(aAlertName),
+                                   PromiseFlatString(aBidi),
+                                   PromiseFlatString(aLang),
+                                   IPC::Principal(aPrincipal));
+    return NS_OK;
+  }
+
+#ifdef MOZ_WIDGET_ANDROID
+  mozilla::AndroidBridge::Bridge()->ShowAlertNotification(aImageUrl, aAlertTitle, aAlertText, aAlertCookie,
+                                                          aAlertListener, aAlertName);
+  return NS_OK;
+#else
+  // Check if there is an optional service that handles system-level notifications
+  nsCOMPtr<nsIAlertsService> sysAlerts(do_GetService(NS_SYSTEMALERTSERVICE_CONTRACTID));
+  nsresult rv;
+  if (sysAlerts) {
+    return sysAlerts->ShowAlertNotification(aImageUrl, aAlertTitle, aAlertText, aAlertTextClickable,
+                                            aAlertCookie, aAlertListener, aAlertName,
+                                            aBidi, aLang, IPC::Principal(aPrincipal));
+  }
+
+  if (!ShouldShowAlert()) {
+    // Do not display the alert. Instead call alertfinished and get out.
+    if (aAlertListener)
+      aAlertListener->Observe(nullptr, "alertfinished", PromiseFlatString(aAlertCookie).get());
+    return NS_OK;
+  }
+
+  // Use XUL notifications as a fallback if above methods have failed.
+  rv = mXULAlerts.ShowAlertNotification(aImageUrl, aAlertTitle, aAlertText, aAlertTextClickable,
+                                        aAlertCookie, aAlertListener, aAlertName,
+                                        aBidi, aLang);
+  return rv;
+#endif // !MOZ_WIDGET_ANDROID
+}
+
+NS_IMETHODIMP nsAlertsService::CloseAlert(const nsAString& aAlertName,
+                                          nsIPrincipal* aPrincipal)
+{
+  if (XRE_GetProcessType() == GeckoProcessType_Content) {
+    ContentChild* cpc = ContentChild::GetSingleton();
+    cpc->SendCloseAlert(nsAutoString(aAlertName), IPC::Principal(aPrincipal));
+    return NS_OK;
+  }
+
+#ifdef MOZ_WIDGET_ANDROID
+  mozilla::widget::android::GeckoAppShell::CloseNotification(aAlertName);
+  return NS_OK;
+#else
+
+  // Try the system notification service.
+  nsCOMPtr<nsIAlertsService> sysAlerts(do_GetService(NS_SYSTEMALERTSERVICE_CONTRACTID));
+  if (sysAlerts) {
+    return sysAlerts->CloseAlert(aAlertName, nullptr);
+  }
+
+  return mXULAlerts.CloseAlert(aAlertName);
+#endif // !MOZ_WIDGET_ANDROID
+}
+
+
+NS_IMETHODIMP nsAlertsService::OnProgress(const nsAString & aAlertName,
+                                          int64_t aProgress,
+                                          int64_t aProgressMax,
+                                          const nsAString & aAlertText)
+{
+#ifdef MOZ_WIDGET_ANDROID
+  mozilla::widget::android::GeckoAppShell::AlertsProgressListener_OnProgress(aAlertName,
+                                                                             aProgress, aProgressMax,
+                                                                             aAlertText);
+  return NS_OK;
+#else
+  return NS_ERROR_NOT_IMPLEMENTED;
+#endif // !MOZ_WIDGET_ANDROID
+}
+
+NS_IMETHODIMP nsAlertsService::OnCancel(const nsAString & aAlertName)
+{
+#ifdef MOZ_WIDGET_ANDROID
+  mozilla::widget::android::GeckoAppShell::CloseNotification(aAlertName);
+  return NS_OK;
+#else
+  return NS_ERROR_NOT_IMPLEMENTED;
+#endif // !MOZ_WIDGET_ANDROID
+}