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diff --git a/src/libs/xpcom18a4/java/src/nsXPTCUtils.h b/src/libs/xpcom18a4/java/src/nsXPTCUtils.h
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+++ b/src/libs/xpcom18a4/java/src/nsXPTCUtils.h
@@ -0,0 +1,128 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla XPCOM.
+ *
+ * The Initial Developer of the Original Code is
+ * the Mozilla Foundation <http://www.mozilla.org/>.
+ * Portions created by the Initial Developer are Copyright (C) 2006
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Benjamin Smedberg <benjamin@smedbergs.us> - New code
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef nsXPTCUtils_h__
+#define nsXPTCUtils_h__
+
+#include "xptcall.h"
+
+#ifdef VBOX
+
+#define NS_DECLARE_STATIC_IID_ACCESSOR(the_iid)                         \
+  template <class Dummy>                                                \
+  struct COMTypeInfo                                                    \
+  {                                                                     \
+    static const nsIID kIID NS_HIDDEN;                                  \
+  };                                                                    \
+  static const nsIID& GetIID() {return COMTypeInfo<int>::kIID;}
+
+
+#define NS_DEFINE_STATIC_IID_ACCESSOR2(the_interface, the_iid)           \
+  template <class Dummy>                                                \
+  const nsIID the_interface::COMTypeInfo<Dummy>::kIID NS_HIDDEN = the_iid;
+
+
+class nsIXPTCProxy : public nsISupports
+{
+public:
+    NS_IMETHOD CallMethod(PRUint16 aMethodIndex,
+                          const XPTMethodDescriptor *aInfo,
+                          nsXPTCMiniVariant *aParams) = 0;
+};
+
+/**
+ * This is a typedef to avoid confusion between the canonical
+ * nsISupports* that provides object identity and an interface pointer
+ * for inheriting interfaces that aren't known at compile-time.
+ */
+typedef nsISupports nsISomeInterface;
+
+/**
+ * Get a proxy object to implement the specified interface.
+ *
+ * @param aIID    The IID of the interface to implement.
+ * @param aOuter  An object to receive method calls from the proxy object.
+ *                The stub forwards QueryInterface/AddRef/Release to the
+ *                outer object. The proxy object does not hold a reference to
+ *                the outer object; it is the caller's responsibility to
+ *                ensure that this pointer remains valid until the stub has
+ *                been destroyed.
+ * @param aStub   Out parameter for the new proxy object. The object is
+ *                not addrefed. The object never destroys itself. It must be
+ *                explicitly destroyed by calling
+ *                NS_DestroyXPTCallStub when it is no longer needed.
+ */
+XPTC_PUBLIC_API(nsresult)
+NS_GetXPTCallStub(REFNSIID aIID, nsIXPTCProxy* aOuter,
+                  nsISomeInterface* *aStub);
+
+/**
+ * Destroys an XPTCall stub previously created with NS_GetXPTCallStub.
+ */
+XPTC_PUBLIC_API(void)
+NS_DestroyXPTCallStub(nsISomeInterface* aStub);
+
+
+#endif
+
+
+/**
+ * A helper class that initializes an xptcall helper at construction
+ * and releases it at destruction.
+ */
+class nsAutoXPTCStub : protected nsIXPTCProxy
+{
+public:
+  nsISomeInterface* mXPTCStub;
+
+protected:
+  nsAutoXPTCStub() : mXPTCStub(nsnull) { }
+
+  nsresult
+  InitStub(const nsIID& aIID)
+  {
+    return NS_GetXPTCallStub(aIID, this, &mXPTCStub);
+  }
+
+  ~nsAutoXPTCStub()
+  {
+    if (mXPTCStub)
+      NS_DestroyXPTCallStub(mXPTCStub);
+  }
+};
+
+#endif // nsXPTCUtils_h__