diff -r 000000000000 -r 6474c204b198 dom/events/CompositionEvent.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/events/CompositionEvent.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,55 @@
+/* -*- 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_CompositionEvent_h_
+#define mozilla_dom_CompositionEvent_h_
+
+#include "mozilla/dom/CompositionEventBinding.h"
+#include "mozilla/dom/UIEvent.h"
+#include "mozilla/EventForwards.h"
+#include "nsIDOMCompositionEvent.h"
+
+namespace mozilla {
+namespace dom {
+
+class CompositionEvent : public UIEvent,
+                         public nsIDOMCompositionEvent
+{
+public:
+  CompositionEvent(EventTarget* aOwner,
+                   nsPresContext* aPresContext,
+                   WidgetCompositionEvent* aEvent);
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_FORWARD_TO_UIEVENT
+  NS_DECL_NSIDOMCOMPOSITIONEVENT
+
+  virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE
+  {
+    return CompositionEventBinding::Wrap(aCx, this);
+  }
+
+  void InitCompositionEvent(const nsAString& aType,
+                            bool aCanBubble,
+                            bool aCancelable,
+                            nsIDOMWindow* aView,
+                            const nsAString& aData,
+                            const nsAString& aLocale,
+                            ErrorResult& aRv)
+  {
+    aRv = InitCompositionEvent(aType, aCanBubble, aCancelable, aView,
+                               aData, aLocale);
+  }
+
+protected:
+  nsString mData;
+  nsString mLocale;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_CompositionEvent_h_