diff -r 000000000000 -r 6474c204b198 dom/quota/CheckQuotaHelper.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/quota/CheckQuotaHelper.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,58 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 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/. */
+
+#ifndef mozilla_dom_quota_checkquotahelper_h__
+#define mozilla_dom_quota_checkquotahelper_h__
+
+#include "QuotaCommon.h"
+
+#include "nsIInterfaceRequestor.h"
+#include "nsIObserver.h"
+#include "nsIRunnable.h"
+
+#include "mozilla/CondVar.h"
+#include "mozilla/Mutex.h"
+
+class nsIPrincipal;
+class nsPIDOMWindow;
+
+BEGIN_QUOTA_NAMESPACE
+
+class CheckQuotaHelper MOZ_FINAL : public nsIRunnable,
+                                   public nsIInterfaceRequestor,
+                                   public nsIObserver
+{
+public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIRUNNABLE
+  NS_DECL_NSIINTERFACEREQUESTOR
+  NS_DECL_NSIOBSERVER
+
+  CheckQuotaHelper(nsPIDOMWindow* aWindow,
+                   mozilla::Mutex& aMutex);
+
+  bool
+  PromptAndReturnQuotaIsDisabled();
+
+  void
+  Cancel();
+
+  static uint32_t
+  GetQuotaPermission(nsIPrincipal* aPrincipal);
+
+private:
+  nsPIDOMWindow* mWindow;
+
+  mozilla::Mutex& mMutex;
+  mozilla::CondVar mCondVar;
+  uint32_t mPromptResult;
+  bool mWaiting;
+  bool mHasPrompted;
+};
+
+END_QUOTA_NAMESPACE
+
+#endif // mozilla_dom_quota_checkquotahelper_h__