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diff --git a/Source/JavaScriptCore/wtf/Noncopyable.h b/Source/JavaScriptCore/wtf/Noncopyable.h
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+++ b/Source/JavaScriptCore/wtf/Noncopyable.h
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+/*
+ *  Copyright (C) 2006, 2010 Apple Inc. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef WTF_Noncopyable_h
+#define WTF_Noncopyable_h
+
+#ifndef __has_feature
+    #define __has_feature(x) 0
+#endif
+
+#if __has_feature(cxx_deleted_functions)
+    #define WTF_MAKE_NONCOPYABLE(ClassName) \
+        _Pragma("clang diagnostic push") \
+        _Pragma("clang diagnostic ignored \"-Wunknown-pragmas\"") \
+        _Pragma("clang diagnostic ignored \"-Wc++0x-extensions\"") \
+        private: \
+            ClassName(const ClassName&) = delete; \
+            ClassName& operator=(const ClassName&) = delete; \
+        _Pragma("clang diagnostic pop")
+#else
+    #define WTF_MAKE_NONCOPYABLE(ClassName) \
+        private: \
+            ClassName(const ClassName&); \
+            ClassName& operator=(const ClassName&)
+#endif
+
+// We don't want argument-dependent lookup to pull in everything from the WTF
+// namespace when you use Noncopyable, so put it in its own namespace.
+
+#include "FastAllocBase.h"
+
+namespace WTFNoncopyable {
+
+    class Noncopyable : public FastAllocBase {
+        Noncopyable(const Noncopyable&);
+        Noncopyable& operator=(const Noncopyable&);
+    protected:
+        Noncopyable() { }
+        ~Noncopyable() { }
+    };
+
+} // namespace WTFNoncopyable
+
+using WTFNoncopyable::Noncopyable;
+
+#endif // WTF_Noncopyable_h