diff -r 000000000000 -r 6474c204b198 dom/events/EventListenerService.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/events/EventListenerService.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,66 @@
+/* -*- 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/. */
+
+#ifndef mozilla_EventListenerService_h_
+#define mozilla_EventListenerService_h_
+
+#include "jsapi.h"
+#include "mozilla/Attributes.h"
+#include "nsAutoPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsIDOMEventListener.h"
+#include "nsIEventListenerService.h"
+#include "nsString.h"
+
+namespace mozilla {
+
+template<typename T>
+class Maybe;
+
+class EventListenerInfo MOZ_FINAL : public nsIEventListenerInfo
+{
+public:
+  EventListenerInfo(const nsAString& aType,
+                    already_AddRefed<nsIDOMEventListener> aListener,
+                    bool aCapturing,
+                    bool aAllowsUntrusted,
+                    bool aInSystemEventGroup)
+    : mType(aType)
+    , mListener(aListener)
+    , mCapturing(aCapturing)
+    , mAllowsUntrusted(aAllowsUntrusted)
+    , mInSystemEventGroup(aInSystemEventGroup)
+  {
+  }
+
+  virtual ~EventListenerInfo() {}
+
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS(EventListenerInfo)
+  NS_DECL_NSIEVENTLISTENERINFO
+
+protected:
+  bool GetJSVal(JSContext* aCx,
+                Maybe<JSAutoCompartment>& aAc,
+                JS::MutableHandle<JS::Value> aJSVal);
+
+  nsString mType;
+  // nsReftPtr because that is what nsListenerStruct uses too.
+  nsRefPtr<nsIDOMEventListener> mListener;
+  bool mCapturing;
+  bool mAllowsUntrusted;
+  bool mInSystemEventGroup;
+};
+
+class EventListenerService MOZ_FINAL : public nsIEventListenerService
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIEVENTLISTENERSERVICE
+};
+
+} // namespace mozilla
+
+#endif // mozilla_EventListenerService_h_