diff -r 000000000000 -r 6474c204b198 xpcom/glue/GenericFactory.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/glue/GenericFactory.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,40 @@
+/* -*- Mode: C++; tab-width: 8; 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/. */
+
+#ifndef mozilla_GenericFactory_h
+#define mozilla_GenericFactory_h
+
+#include "mozilla/Attributes.h"
+
+#include "mozilla/Module.h"
+
+namespace mozilla {
+
+/**
+ * A generic factory which uses a constructor function to create instances.
+ * This class is intended for use by the component manager and the generic
+ * module.
+ */
+class GenericFactory MOZ_FINAL : public nsIFactory
+{
+public:
+  typedef Module::ConstructorProcPtr ConstructorProcPtr;
+
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIFACTORY
+
+  GenericFactory(ConstructorProcPtr ctor)
+    : mCtor(ctor)
+  {
+    NS_ASSERTION(mCtor, "GenericFactory with no constructor");
+  }
+
+private:
+  ConstructorProcPtr mCtor;
+};
+
+} // namespace mozilla
+
+#endif // mozilla_GenericFactory_h