diff -r 000000000000 -r 6474c204b198 dom/devicestorage/DeviceStorageFileDescriptor.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/devicestorage/DeviceStorageFileDescriptor.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 sw=2 et 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 DeviceStorageFileDescriptor_h
+#define DeviceStorageFileDescriptor_h
+
+#include "mozilla/ipc/FileDescriptor.h"
+
+struct DeviceStorageFileDescriptor MOZ_FINAL
+{
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DeviceStorageFileDescriptor)
+  nsRefPtr<DeviceStorageFile> mDSFile;
+  mozilla::ipc::FileDescriptor mFileDescriptor;
+};
+
+#endif