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diff --git a/src/3rdparty/webkit/JavaScriptCore/wrec/Escapes.h b/src/3rdparty/webkit/JavaScriptCore/wrec/Escapes.h
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+++ b/src/3rdparty/webkit/JavaScriptCore/wrec/Escapes.h
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+/*
+ * Copyright (C) 2008 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 Escapes_h
+#define Escapes_h
+
+#include <wtf/Platform.h>
+
+#if ENABLE(WREC)
+
+#include <wtf/Assertions.h>
+
+namespace JSC { namespace WREC {
+
+    class CharacterClass;
+
+    class Escape {
+    public:
+        enum Type {
+            PatternCharacter,
+            CharacterClass,
+            Backreference,
+            WordBoundaryAssertion,
+            Error,
+        };
+        
+        Escape(Type type)
+            : m_type(type)
+        {
+        }
+
+        Type type() const { return m_type; }
+
+    private:
+        Type m_type;
+        
+    protected:
+        // Used by subclasses to store data.
+        union {
+            int i;
+            const WREC::CharacterClass* c;
+        } m_u;
+        bool m_invert;
+    };
+
+    class PatternCharacterEscape : public Escape {
+    public:
+        static const PatternCharacterEscape& cast(const Escape& escape)
+        {
+            ASSERT(escape.type() == PatternCharacter);
+            return static_cast<const PatternCharacterEscape&>(escape);
+        }
+        
+        PatternCharacterEscape(int character)
+            : Escape(PatternCharacter)
+        {
+            m_u.i = character;
+        }
+        
+        operator Escape() const { return *this; }
+        
+        int character() const { return m_u.i; }
+    };
+
+    class CharacterClassEscape : public Escape {
+    public:
+        static const CharacterClassEscape& cast(const Escape& escape)
+        {
+            ASSERT(escape.type() == CharacterClass);
+            return static_cast<const CharacterClassEscape&>(escape);
+        }
+        
+        CharacterClassEscape(const WREC::CharacterClass& characterClass, bool invert)
+            : Escape(CharacterClass)
+        {
+            m_u.c = &characterClass;
+            m_invert = invert;
+        }
+        
+        operator Escape() { return *this; }
+        
+        const WREC::CharacterClass& characterClass() const { return *m_u.c; }
+        bool invert() const { return m_invert; }
+    };
+
+    class BackreferenceEscape : public Escape {
+    public:
+        static const BackreferenceEscape& cast(const Escape& escape)
+        {
+            ASSERT(escape.type() == Backreference);
+            return static_cast<const BackreferenceEscape&>(escape);
+        }
+        
+        BackreferenceEscape(int subpatternId)
+            : Escape(Backreference)
+        {
+            m_u.i = subpatternId;
+        }
+        
+        operator Escape() const { return *this; }
+        
+        int subpatternId() const { return m_u.i; }
+    };
+
+    class WordBoundaryAssertionEscape : public Escape {
+    public:
+        static const WordBoundaryAssertionEscape& cast(const Escape& escape)
+        {
+            ASSERT(escape.type() == WordBoundaryAssertion);
+            return static_cast<const WordBoundaryAssertionEscape&>(escape);
+        }
+        
+        WordBoundaryAssertionEscape(bool invert)
+            : Escape(WordBoundaryAssertion)
+        {
+            m_invert = invert;
+        }
+        
+        operator Escape() const { return *this; }
+        
+        bool invert() const { return m_invert; }
+    };
+
+} } // namespace JSC::WREC
+
+#endif // ENABLE(WREC)
+
+#endif // Escapes_h