diff -r 000000000000 -r 6474c204b198 dom/events/MessageEvent.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/events/MessageEvent.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,210 @@
+/* -*- 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/MessageEvent.h"
+#include "mozilla/dom/MessageEventBinding.h"
+#include "mozilla/dom/MessagePort.h"
+#include "mozilla/dom/MessagePortBinding.h"
+#include "mozilla/dom/MessagePortList.h"
+#include "mozilla/dom/UnionTypes.h"
+
+#include "mozilla/HoldDropJSObjects.h"
+#include "jsapi.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(MessageEvent)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(MessageEvent, Event)
+  tmp->mData = JSVAL_VOID;
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mWindowSource)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mPortSource)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mPorts)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(MessageEvent, Event)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mWindowSource)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPortSource)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPorts)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(MessageEvent, Event)
+  NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mData)
+NS_IMPL_CYCLE_COLLECTION_TRACE_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(MessageEvent)
+  NS_INTERFACE_MAP_ENTRY(nsIDOMMessageEvent)
+NS_INTERFACE_MAP_END_INHERITING(Event)
+
+NS_IMPL_ADDREF_INHERITED(MessageEvent, Event)
+NS_IMPL_RELEASE_INHERITED(MessageEvent, Event)
+
+MessageEvent::MessageEvent(EventTarget* aOwner,
+                           nsPresContext* aPresContext,
+                           WidgetEvent* aEvent)
+  : Event(aOwner, aPresContext, aEvent)
+  , mData(JSVAL_VOID)
+{
+}
+
+MessageEvent::~MessageEvent()
+{
+  mData = JSVAL_VOID;
+  DropJSObjects(this);
+}
+
+JSObject*
+MessageEvent::WrapObject(JSContext* aCx)
+{
+  return mozilla::dom::MessageEventBinding::Wrap(aCx, this);
+}
+
+NS_IMETHODIMP
+MessageEvent::GetData(JSContext* aCx, JS::MutableHandle<JS::Value> aData)
+{
+  ErrorResult rv;
+  GetData(aCx, aData, rv);
+  return rv.ErrorCode();
+}
+
+void
+MessageEvent::GetData(JSContext* aCx, JS::MutableHandle<JS::Value> aData,
+                      ErrorResult& aRv)
+{
+  JS::ExposeValueToActiveJS(mData);
+  aData.set(mData);
+  if (!JS_WrapValue(aCx, aData)) {
+    aRv.Throw(NS_ERROR_FAILURE);
+  }
+}
+
+NS_IMETHODIMP
+MessageEvent::GetOrigin(nsAString& aOrigin)
+{
+  aOrigin = mOrigin;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MessageEvent::GetLastEventId(nsAString& aLastEventId)
+{
+  aLastEventId = mLastEventId;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MessageEvent::GetSource(nsIDOMWindow** aSource)
+{
+  NS_IF_ADDREF(*aSource = mWindowSource);
+  return NS_OK;
+}
+
+void
+MessageEvent::GetSource(Nullable<OwningWindowProxyOrMessagePort>& aValue) const
+{
+  if (mWindowSource) {
+    aValue.SetValue().SetAsWindowProxy() = mWindowSource;
+  } else if (mPortSource) {
+    aValue.SetValue().SetAsMessagePort() = mPortSource;
+  }
+}
+
+/* static */ already_AddRefed<MessageEvent>
+MessageEvent::Constructor(const GlobalObject& aGlobal,
+                          JSContext* aCx, const nsAString& aType,
+                          const MessageEventInit& aParam,
+                          ErrorResult& aRv)
+{
+  nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
+  nsRefPtr<MessageEvent> event = new MessageEvent(t, nullptr, nullptr);
+
+  aRv = event->InitEvent(aType, aParam.mBubbles, aParam.mCancelable);
+  if (aRv.Failed()) {
+    return nullptr;
+  }
+
+  bool trusted = event->Init(t);
+  event->SetTrusted(trusted);
+
+  event->mData = aParam.mData;
+
+  mozilla::HoldJSObjects(event.get());
+
+  if (aParam.mOrigin.WasPassed()) {
+    event->mOrigin = aParam.mOrigin.Value();
+  }
+
+  if (aParam.mLastEventId.WasPassed()) {
+    event->mLastEventId = aParam.mLastEventId.Value();
+  }
+
+  if (!aParam.mSource.IsNull()) {
+    if (aParam.mSource.Value().IsWindowProxy()) {
+      event->mWindowSource = aParam.mSource.Value().GetAsWindowProxy();
+    } else {
+      event->mPortSource = aParam.mSource.Value().GetAsMessagePort();
+    }
+
+    MOZ_ASSERT(event->mWindowSource || event->mPortSource);
+  }
+
+  if (aParam.mPorts.WasPassed() && !aParam.mPorts.Value().IsNull()) {
+    nsTArray<nsRefPtr<MessagePortBase>> ports;
+    for (uint32_t i = 0, len = aParam.mPorts.Value().Value().Length(); i < len; ++i) {
+      ports.AppendElement(aParam.mPorts.Value().Value()[i].get());
+    }
+
+    event->mPorts = new MessagePortList(static_cast<EventBase*>(event), ports);
+  }
+
+  return event.forget();
+}
+
+NS_IMETHODIMP
+MessageEvent::InitMessageEvent(const nsAString& aType,
+                               bool aCanBubble,
+                               bool aCancelable,
+                               JS::Handle<JS::Value> aData,
+                               const nsAString& aOrigin,
+                               const nsAString& aLastEventId,
+                               nsIDOMWindow* aSource)
+{
+  nsresult rv = Event::InitEvent(aType, aCanBubble, aCancelable);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  mData = aData;
+  mozilla::HoldJSObjects(this);
+  mOrigin = aOrigin;
+  mLastEventId = aLastEventId;
+  mWindowSource = aSource;
+
+  return NS_OK;
+}
+
+void
+MessageEvent::SetPorts(MessagePortList* aPorts)
+{
+  MOZ_ASSERT(!mPorts && aPorts);
+  mPorts = aPorts;
+}
+
+} // namespace dom
+} // namespace mozilla
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsresult
+NS_NewDOMMessageEvent(nsIDOMEvent** aInstancePtrResult,
+                      EventTarget* aOwner,
+                      nsPresContext* aPresContext,
+                      WidgetEvent* aEvent) 
+{
+  MessageEvent* it = new MessageEvent(aOwner, aPresContext, aEvent);
+  NS_ADDREF(it);
+  *aInstancePtrResult = static_cast<Event*>(it);
+  return NS_OK;
+}