diff -r 000000000000 -r 6474c204b198 dom/events/MutationEvent.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/events/MutationEvent.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,64 @@
+/* -*- 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_MutationEvent_h_
+#define mozilla_dom_MutationEvent_h_
+
+#include "mozilla/EventForwards.h"
+#include "mozilla/dom/Event.h"
+#include "mozilla/dom/MutationEventBinding.h"
+#include "nsIDOMMutationEvent.h"
+#include "nsINode.h"
+
+namespace mozilla {
+namespace dom {
+
+class MutationEvent : public Event,
+                      public nsIDOMMutationEvent
+{
+public:
+  MutationEvent(EventTarget* aOwner,
+                nsPresContext* aPresContext,
+                InternalMutationEvent* aEvent);
+
+  NS_DECL_ISUPPORTS_INHERITED
+
+  NS_DECL_NSIDOMMUTATIONEVENT
+
+  // Forward to base class
+  NS_FORWARD_TO_EVENT
+
+  virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE
+  {
+    return MutationEventBinding::Wrap(aCx, this);
+  }
+
+  // xpidl implementation
+  // GetPrevValue(nsAString& aPrevValue);
+  // GetNewValue(nsAString& aNewValue);
+  // GetAttrName(nsAString& aAttrName);
+
+  already_AddRefed<nsINode> GetRelatedNode();
+
+  uint16_t AttrChange();
+
+  void InitMutationEvent(const nsAString& aType,
+                         bool& aCanBubble, bool& aCancelable,
+                         nsINode* aRelatedNode,
+                         const nsAString& aPrevValue,
+                         const nsAString& aNewValue,
+                         const nsAString& aAttrName,
+                         uint16_t& aAttrChange, ErrorResult& aRv)
+  {
+    aRv = InitMutationEvent(aType, aCanBubble, aCancelable,
+                            aRelatedNode ? aRelatedNode->AsDOMNode() : nullptr,
+                            aPrevValue, aNewValue, aAttrName, aAttrChange);
+  }
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_MutationEvent_h_