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diff --git a/Source/JavaScriptCore/runtime/ConcurrentJITLock.h b/Source/JavaScriptCore/runtime/ConcurrentJITLock.h
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index 84233d035..000000000
--- a/Source/JavaScriptCore/runtime/ConcurrentJITLock.h
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-/*
- * Copyright (C) 2013 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
- */
-
-#ifndef ConcurrentJITLock_h
-#define ConcurrentJITLock_h
-
-#include "DeferGC.h"
-#include <wtf/ByteSpinLock.h>
-#include <wtf/NoLock.h>
-
-namespace JSC {
-
-#if ENABLE(CONCURRENT_JIT)
-typedef ByteSpinLock ConcurrentJITLock;
-typedef ByteSpinLocker ConcurrentJITLockerImpl;
-#else
-typedef NoLock ConcurrentJITLock;
-typedef NoLockLocker ConcurrentJITLockerImpl;
-#endif
-
-class ConcurrentJITLockerBase {
-    WTF_MAKE_NONCOPYABLE(ConcurrentJITLockerBase);
-public:
-    explicit ConcurrentJITLockerBase(ConcurrentJITLock& lockable)
-        : m_locker(&lockable)
-    {
-    }
-    explicit ConcurrentJITLockerBase(ConcurrentJITLock* lockable)
-        : m_locker(lockable)
-    {
-    }
-
-    ~ConcurrentJITLockerBase()
-    {
-    }
-    
-    void unlockEarly()
-    {
-        m_locker.unlockEarly();
-    }
-
-private:
-    ConcurrentJITLockerImpl m_locker;
-};
-
-class GCSafeConcurrentJITLocker : public ConcurrentJITLockerBase {
-public:
-    GCSafeConcurrentJITLocker(ConcurrentJITLock& lockable, Heap& heap)
-        : ConcurrentJITLockerBase(lockable)
-        , m_deferGC(heap)
-    {
-    }
-
-    GCSafeConcurrentJITLocker(ConcurrentJITLock* lockable, Heap& heap)
-        : ConcurrentJITLockerBase(lockable)
-        , m_deferGC(heap)
-    {
-    }
-
-    ~GCSafeConcurrentJITLocker()
-    {
-        // We have to unlock early due to the destruction order of base
-        // vs. derived classes. If we didn't, then we would destroy the 
-        // DeferGC object before unlocking the lock which could cause a GC
-        // and resulting deadlock.
-        unlockEarly();
-    }
-
-private:
-#if ENABLE(CONCURRENT_JIT)
-    DeferGC m_deferGC;
-#else
-    struct NoDefer {
-        NoDefer(Heap& heap) : m_heap(heap) { }
-        Heap& m_heap;
-    };
-    NoDefer m_deferGC;
-#endif
-};
-
-class ConcurrentJITLocker : public ConcurrentJITLockerBase {
-public:
-    ConcurrentJITLocker(ConcurrentJITLock& lockable)
-        : ConcurrentJITLockerBase(lockable)
-    {
-    }
-
-    ConcurrentJITLocker(ConcurrentJITLock* lockable)
-        : ConcurrentJITLockerBase(lockable)
-    {
-    }
-
-#if ENABLE(CONCURRENT_JIT) && !defined(NDEBUG)
-private:
-    DisallowGC m_disallowGC;
-#endif
-};
-
-} // namespace JSC
-
-#endif // ConcurrentJITLock_h