diff -r 000000000000 -r 6474c204b198 toolkit/components/osfile/NativeOSFileInternals.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/osfile/NativeOSFileInternals.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,24 @@
+/* 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_nativeosfileinternalservice_h__
+#define mozilla_nativeosfileinternalservice_h__
+
+#include "nsINativeOSFileInternals.h"
+#include "mozilla/Attributes.h"
+
+namespace mozilla {
+
+class NativeOSFileInternalsService MOZ_FINAL : public nsINativeOSFileInternalsService {
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSINATIVEOSFILEINTERNALSSERVICE
+private:
+  // Avoid accidental use of built-in operator=
+  void operator=(const NativeOSFileInternalsService& other) MOZ_DELETE;
+};
+
+} // namespace mozilla
+
+#endif // mozilla_finalizationwitnessservice_h__