diff -r 000000000000 -r 6474c204b198 dom/base/DOMRequest.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/base/DOMRequest.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,109 @@
+/* -*- 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_domrequest_h__
+#define mozilla_dom_domrequest_h__
+
+#include "nsIDOMDOMRequest.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/DOMEventTargetHelper.h"
+#include "mozilla/dom/DOMRequestBinding.h"
+
+#include "nsCOMPtr.h"
+
+namespace mozilla {
+namespace dom {
+
+class DOMRequest : public DOMEventTargetHelper,
+                   public nsIDOMDOMRequest
+{
+protected:
+  JS::Heap<JS::Value> mResult;
+  nsCOMPtr<nsISupports> mError;
+  bool mDone;
+
+public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_NSIDOMDOMREQUEST
+  NS_REALLY_FORWARD_NSIDOMEVENTTARGET(DOMEventTargetHelper)
+
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(DOMRequest,
+                                                         DOMEventTargetHelper)
+
+  // WrapperCache
+  nsPIDOMWindow* GetParentObject() const
+  {
+    return GetOwner();
+  }
+
+  virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
+
+  // WebIDL Interface
+  DOMRequestReadyState ReadyState() const
+  {
+    return mDone ? DOMRequestReadyState::Done
+                 : DOMRequestReadyState::Pending;
+  }
+
+  void GetResult(JSContext*, JS::MutableHandle<JS::Value> aRetval) const
+  {
+    NS_ASSERTION(mDone || mResult == JSVAL_VOID,
+                 "Result should be undefined when pending");
+    JS::ExposeValueToActiveJS(mResult);
+    aRetval.set(mResult);
+  }
+
+  nsISupports* GetError() const
+  {
+    NS_ASSERTION(mDone || !mError,
+                 "Error should be null when pending");
+    return mError;
+  }
+
+  IMPL_EVENT_HANDLER(success)
+  IMPL_EVENT_HANDLER(error)
+
+
+  void FireSuccess(JS::Handle<JS::Value> aResult);
+  void FireError(const nsAString& aError);
+  void FireError(nsresult aError);
+  void FireDetailedError(nsISupports* aError);
+
+  DOMRequest(nsPIDOMWindow* aWindow);
+
+  virtual ~DOMRequest()
+  {
+    mResult = JSVAL_VOID;
+    mozilla::DropJSObjects(this);
+  }
+
+protected:
+  void FireEvent(const nsAString& aType, bool aBubble, bool aCancelable);
+
+  void RootResultVal();
+};
+
+class DOMRequestService MOZ_FINAL : public nsIDOMRequestService
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIDOMREQUESTSERVICE
+
+  // Returns an owning reference! No one should call this but the factory.
+  static DOMRequestService* FactoryCreate()
+  {
+    DOMRequestService* res = new DOMRequestService;
+    NS_ADDREF(res);
+    return res;
+  }
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#define DOMREQUEST_SERVICE_CONTRACTID "@mozilla.org/dom/dom-request-service;1"
+
+#endif // mozilla_dom_domrequest_h__