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diff --git a/Source/WebCore/rendering/RenderScrollbarPart.h b/Source/WebCore/rendering/RenderScrollbarPart.h
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+++ b/Source/WebCore/rendering/RenderScrollbarPart.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 RenderScrollbarPart_h
+#define RenderScrollbarPart_h
+
+#include "RenderBlock.h"
+#include "ScrollTypes.h"
+
+namespace WebCore {
+
+class RenderScrollbar;
+
+class RenderScrollbarPart : public RenderBlock {
+public:
+    RenderScrollbarPart(Node*, RenderScrollbar* = 0, ScrollbarPart = NoPart);
+    virtual ~RenderScrollbarPart();
+
+    virtual const char* renderName() const { return "RenderScrollbarPart"; }
+    
+    virtual bool requiresLayer() const { return false; }
+
+    virtual void layout();
+    virtual void computePreferredLogicalWidths();
+    
+    void paintIntoRect(GraphicsContext*, int tx, int ty, const IntRect&);
+    
+protected:
+    virtual void styleWillChange(StyleDifference diff, const RenderStyle* newStyle);
+    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
+    virtual void imageChanged(WrappedImagePtr, const IntRect* = 0);
+
+private:
+    void layoutHorizontalPart();
+    void layoutVerticalPart();
+
+    void computeScrollbarWidth();
+    void computeScrollbarHeight();
+    
+    RenderScrollbar* m_scrollbar;
+    ScrollbarPart m_part;
+};
+
+} // namespace WebCore
+
+#endif // RenderScrollbarPart_h