diff -r 000000000000 -r 6474c204b198 xpcom/components/nsNativeComponentLoader.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/components/nsNativeComponentLoader.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,51 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 nsNativeModuleLoader_h__
+#define nsNativeModuleLoader_h__
+
+#include "nsISupports.h"
+#include "mozilla/ModuleLoader.h"
+#include "nsDataHashtable.h"
+#include "nsHashKeys.h"
+#include "mozilla/Module.h"
+#include "prlink.h"
+
+class nsNativeModuleLoader : public mozilla::ModuleLoader
+{
+ public:
+    NS_DECL_ISUPPORTS_INHERITED
+
+    nsNativeModuleLoader() {}
+    ~nsNativeModuleLoader() {}
+
+    virtual const mozilla::Module* LoadModule(mozilla::FileLocation &aFile) MOZ_OVERRIDE;
+
+    nsresult Init();
+
+    void UnloadLibraries();
+
+ private:
+    struct NativeLoadData
+    {
+        NativeLoadData()
+            : module(nullptr)
+            , library(nullptr)
+        { }
+
+        const mozilla::Module* module;
+        PRLibrary* library;
+    };
+
+    static PLDHashOperator
+    ReleaserFunc(nsIHashable* aHashedFile, NativeLoadData &aLoadData, void*);
+
+    static PLDHashOperator
+    UnloaderFunc(nsIHashable* aHashedFile, NativeLoadData &aLoadData, void*);
+
+    nsDataHashtable<nsHashableHashKey, NativeLoadData> mLibraries;
+};
+
+#endif /* nsNativeModuleLoader_h__ */