diff -r 000000000000 -r 6474c204b198 dom/events/InputEvent.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/events/InputEvent.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,75 @@
+/* -*- 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/. */
+
+#include "mozilla/dom/InputEvent.h"
+#include "mozilla/TextEvents.h"
+#include "prtime.h"
+
+namespace mozilla {
+namespace dom {
+
+InputEvent::InputEvent(EventTarget* aOwner,
+                       nsPresContext* aPresContext,
+                       InternalEditorInputEvent* aEvent)
+  : UIEvent(aOwner, aPresContext,
+            aEvent ? aEvent : new InternalEditorInputEvent(false, 0, nullptr))
+{
+  NS_ASSERTION(mEvent->eventStructType == NS_EDITOR_INPUT_EVENT,
+               "event type mismatch");
+
+  if (aEvent) {
+    mEventIsInternal = false;
+  } else {
+    mEventIsInternal = true;
+    mEvent->time = PR_Now();
+  }
+}
+
+NS_IMPL_ADDREF_INHERITED(InputEvent, UIEvent)
+NS_IMPL_RELEASE_INHERITED(InputEvent, UIEvent)
+
+NS_INTERFACE_MAP_BEGIN(InputEvent)
+NS_INTERFACE_MAP_END_INHERITING(UIEvent)
+
+bool
+InputEvent::IsComposing()
+{
+  return mEvent->AsEditorInputEvent()->mIsComposing;
+}
+
+already_AddRefed<InputEvent>
+InputEvent::Constructor(const GlobalObject& aGlobal,
+                        const nsAString& aType,
+                        const InputEventInit& aParam,
+                        ErrorResult& aRv)
+{
+  nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
+  nsRefPtr<InputEvent> e = new InputEvent(t, nullptr, nullptr);
+  bool trusted = e->Init(t);
+  aRv = e->InitUIEvent(aType, aParam.mBubbles, aParam.mCancelable,
+                       aParam.mView, aParam.mDetail);
+  InternalEditorInputEvent* internalEvent = e->mEvent->AsEditorInputEvent();
+  internalEvent->mIsComposing = aParam.mIsComposing;
+  e->SetTrusted(trusted);
+  return e.forget();
+}
+
+} // namespace dom
+} // namespace mozilla
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsresult
+NS_NewDOMInputEvent(nsIDOMEvent** aInstancePtrResult,
+                    EventTarget* aOwner,
+                    nsPresContext* aPresContext,
+                    InternalEditorInputEvent* aEvent)
+{
+  InputEvent* it = new InputEvent(aOwner, aPresContext, aEvent);
+  NS_ADDREF(it);
+  *aInstancePtrResult = static_cast<Event*>(it);
+  return NS_OK;
+}