diff -r 000000000000 -r 6474c204b198 dom/base/MessagePortList.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/base/MessagePortList.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,76 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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_MessagePortList_h
+#define mozilla_dom_MessagePortList_h
+
+#include "mozilla/Attributes.h"
+#include "mozilla/ErrorResult.h"
+#include "nsCycleCollectionParticipant.h"
+#include "mozilla/dom/MessagePort.h"
+#include "nsWrapperCache.h"
+#include "nsAutoPtr.h"
+#include "nsTArray.h"
+
+namespace mozilla {
+namespace dom {
+
+class MessagePortList MOZ_FINAL : public nsISupports
+                                , public nsWrapperCache
+{
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(MessagePortList)
+
+public:
+  MessagePortList(nsISupports* aOwner, nsTArray<nsRefPtr<MessagePortBase>>& aPorts)
+    : mOwner(aOwner)
+    , mPorts(aPorts)
+  {
+    SetIsDOMBinding();
+  }
+
+  nsISupports*
+  GetParentObject() const
+  {
+    return mOwner;
+  }
+
+  virtual JSObject*
+  WrapObject(JSContext* aCx) MOZ_OVERRIDE;
+
+  uint32_t
+  Length() const
+  {
+    return mPorts.Length();
+  }
+
+  MessagePortBase*
+  Item(uint32_t aIndex)
+  {
+    return mPorts.SafeElementAt(aIndex);
+  }
+
+  MessagePortBase*
+  IndexedGetter(uint32_t aIndex, bool &aFound)
+  {
+    aFound = aIndex < mPorts.Length();
+    if (!aFound) {
+      return nullptr;
+    }
+    return mPorts[aIndex];
+  }
+
+public:
+  nsCOMPtr<nsISupports> mOwner;
+  nsTArray<nsRefPtr<MessagePortBase>> mPorts;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_MessagePortList_h
+