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diff --git a/Source/JavaScriptCore/wtf/PassTraits.h b/Source/JavaScriptCore/wtf/PassTraits.h
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index 9564e3ad3..000000000
--- a/Source/JavaScriptCore/wtf/PassTraits.h
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-/*
- * Copyright (C) 2011 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.
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- *     its contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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 WTF_PassTraits_h
-#define WTF_PassTraits_h
-
-#include <wtf/OwnPtr.h>
-#include <wtf/RefPtr.h>
-
-// The PassTraits template exists to help optimize (or make possible) use
-// of WTF data structures with WTF smart pointers that have a Pass
-// variant for transfer of ownership
-
-namespace WTF {
-
-template<typename T> struct PassTraits {
-    typedef T Type;
-    typedef T PassType;
-    static PassType transfer(Type& value) { return value; }
-};
-
-template<typename T> struct PassTraits<OwnPtr<T> > {
-    typedef OwnPtr<T> Type;
-    typedef PassOwnPtr<T> PassType;
-    static PassType transfer(Type& value) { return value.release(); }
-};
-
-template<typename T> struct PassTraits<RefPtr<T> > {
-    typedef RefPtr<T> Type;
-    typedef PassRefPtr<T> PassType;
-    static PassType transfer(Type& value) { return value.release(); }
-};
-
-} // namespace WTF
-
-using WTF::PassTraits;
-
-#endif // WTF_PassTraits_h