diff -r 000000000000 -r 6474c204b198 dom/events/MouseScrollEvent.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/events/MouseScrollEvent.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,58 @@
+/* -*- 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_dom_MouseScrollEvent_h_
+#define mozilla_dom_MouseScrollEvent_h_
+
+#include "nsIDOMMouseScrollEvent.h"
+#include "mozilla/dom/MouseEvent.h"
+#include "mozilla/dom/MouseScrollEventBinding.h"
+
+namespace mozilla {
+namespace dom {
+
+class MouseScrollEvent : public MouseEvent,
+                         public nsIDOMMouseScrollEvent
+{
+public:
+  MouseScrollEvent(EventTarget* aOwner,
+                   nsPresContext* aPresContext,
+                   WidgetMouseScrollEvent* aEvent);
+
+  NS_DECL_ISUPPORTS_INHERITED
+
+  // nsIDOMMouseScrollEvent Interface
+  NS_DECL_NSIDOMMOUSESCROLLEVENT
+
+  // Forward to base class
+  NS_FORWARD_TO_MOUSEEVENT
+
+  virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE
+  {
+    return MouseScrollEventBinding::Wrap(aCx, this);
+  }
+
+  int32_t Axis();
+
+  void InitMouseScrollEvent(const nsAString& aType, bool aCanBubble,
+                            bool aCancelable, nsIDOMWindow* aView,
+                            int32_t aDetail, int32_t aScreenX, int32_t aScreenY,
+                            int32_t aClientX, int32_t aClientY,
+                            bool aCtrlKey, bool aAltKey, bool aShiftKey,
+                            bool aMetaKey, uint16_t aButton,
+                            nsIDOMEventTarget* aRelatedTarget, int32_t aAxis,
+                            ErrorResult& aRv)
+  {
+    aRv = InitMouseScrollEvent(aType, aCanBubble, aCancelable, aView,
+                               aDetail, aScreenX, aScreenY, aClientX, aClientY,
+                               aCtrlKey, aAltKey, aShiftKey, aMetaKey, aButton,
+                               aRelatedTarget, aAxis);
+  }
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_MouseScrollEvent_h_