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diff --git a/Source/WebCore/css/CSSTimingFunctionValue.h b/Source/WebCore/css/CSSTimingFunctionValue.h
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+++ b/Source/WebCore/css/CSSTimingFunctionValue.h
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+/*
+ * Copyright (C) 2007, 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 COMPUTER, 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 COMPUTER, 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 CSSTimingFunctionValue_h
+#define CSSTimingFunctionValue_h
+
+#include "CSSValue.h"
+#include <wtf/PassRefPtr.h>
+
+namespace WebCore {
+
+class CSSTimingFunctionValue : public CSSValue {
+public:
+    virtual String cssText() const = 0;
+
+    virtual bool isLinearTimingFunctionValue() const { return false; }
+    virtual bool isCubicBezierTimingFunctionValue() const { return false; }
+    virtual bool isStepsTimingFunctionValue() const { return false; }
+
+protected:
+    CSSTimingFunctionValue()
+    {
+    }
+
+    virtual bool isTimingFunctionValue() const { return true; }
+};
+
+class CSSLinearTimingFunctionValue : public CSSTimingFunctionValue {
+public:
+    static PassRefPtr<CSSLinearTimingFunctionValue> create()
+    {
+        return adoptRef(new CSSLinearTimingFunctionValue);
+    }
+    
+private:
+    CSSLinearTimingFunctionValue()
+    {
+    }
+
+    virtual String cssText() const;
+
+    virtual bool isLinearTimingFunctionValue() const { return true; }
+};
+    
+class CSSCubicBezierTimingFunctionValue : public CSSTimingFunctionValue {
+public:
+    static PassRefPtr<CSSCubicBezierTimingFunctionValue> create(double x1, double y1, double x2, double y2)
+    {
+        return adoptRef(new CSSCubicBezierTimingFunctionValue(x1, y1, x2, y2));
+    }
+
+    double x1() const { return m_x1; }
+    double y1() const { return m_y1; }
+    double x2() const { return m_x2; }
+    double y2() const { return m_y2; }
+
+private:
+    CSSCubicBezierTimingFunctionValue(double x1, double y1, double x2, double y2)
+        : m_x1(x1)
+        , m_y1(y1)
+        , m_x2(x2)
+        , m_y2(y2)
+    {
+    }
+
+    virtual String cssText() const;
+
+    virtual bool isCubicBezierTimingFunctionValue() const { return true; }
+
+    double m_x1;
+    double m_y1;
+    double m_x2;
+    double m_y2;
+};
+
+class CSSStepsTimingFunctionValue : public CSSTimingFunctionValue {
+public:
+    static PassRefPtr<CSSStepsTimingFunctionValue> create(int steps, bool stepAtStart)
+    {
+        return adoptRef(new CSSStepsTimingFunctionValue(steps, stepAtStart));
+    }
+
+    int numberOfSteps() const { return m_steps; }
+    bool stepAtStart() const { return m_stepAtStart; }
+    
+private:
+    CSSStepsTimingFunctionValue(int steps, bool stepAtStart)
+        : m_steps(steps)
+        , m_stepAtStart(stepAtStart)
+    {
+    }
+
+    virtual String cssText() const;
+
+    virtual bool isStepsTimingFunctionValue() const { return true; }
+
+    int m_steps;
+    bool m_stepAtStart;
+};
+    
+} // namespace
+
+#endif