diff -r 000000000000 -r 6474c204b198 xpcom/base/nsUUIDGenerator.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/base/nsUUIDGenerator.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 50; 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 _NSUUIDGENERATOR_H_
+#define _NSUUIDGENERATOR_H_
+
+#include "mozilla/Attributes.h"
+#include "mozilla/Mutex.h"
+
+#include "nsIUUIDGenerator.h"
+
+class nsUUIDGenerator MOZ_FINAL : public nsIUUIDGenerator {
+public:
+    nsUUIDGenerator();
+
+    NS_DECL_THREADSAFE_ISUPPORTS
+
+    NS_DECL_NSIUUIDGENERATOR
+
+    nsresult Init();
+
+private:
+    ~nsUUIDGenerator();
+
+protected:
+
+    mozilla::Mutex mLock;
+#if !defined(XP_WIN) && !defined(XP_MACOSX) && !defined(ANDROID)
+    char mState[128];
+    char *mSavedState;
+    uint8_t mRBytes;
+#endif
+};
+
+#define NS_UUID_GENERATOR_CONTRACTID "@mozilla.org/uuid-generator;1"
+#define NS_UUID_GENERATOR_CID \
+{ 0x706d36bb, 0xbf79, 0x4293, \
+{ 0x81, 0xf2, 0x8f, 0x68, 0x28, 0xc1, 0x8f, 0x9d } }
+
+#endif /* _NSUUIDGENERATOR_H_ */