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diff --git a/Source/WebKit/chromium/src/WebScrollbarImpl.h b/Source/WebKit/chromium/src/WebScrollbarImpl.h
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+++ b/Source/WebKit/chromium/src/WebScrollbarImpl.h
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+/*
+ * Copyright (C) 2010 Google 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER 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 WebScrollbarImpl_h
+#define WebScrollbarImpl_h
+
+#include "WebScrollbar.h"
+
+#include <wtf/RefPtr.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+class IntPoint;
+class IntRect;
+class Scrollbar;
+}
+
+namespace WebKit {
+
+class ScrollbarGroup;
+
+class WebScrollbarImpl : public WebScrollbar {
+public:
+    WebScrollbarImpl(Orientation,
+                     ScrollbarGroup*,                     
+                     WebScrollbarClient*);
+    ~WebScrollbarImpl();
+
+    void setScrollOffset(int);
+    void invalidateScrollbarRect(const WebCore::IntRect&);
+    void getTickmarks(Vector<WebCore::IntRect>&) const;
+    WebCore::IntPoint convertFromContainingViewToScrollbar(const WebCore::IntPoint& parentPoint) const;
+    void scrollbarStyleChanged();
+
+    int scrollOffset() { return m_scrollOffset; }
+    WebCore::Scrollbar* scrollbar() { return m_scrollbar.get(); }
+
+    // WebKit::WebScrollbar methods
+    virtual bool isOverlay() const;
+    virtual void setLocation(const WebRect&);
+    virtual int value() const;
+    virtual void setValue(int position);
+    virtual void setDocumentSize(int size);
+    virtual void scroll(ScrollDirection, ScrollGranularity, float multiplier);
+    virtual void paint(WebCanvas*, const WebRect&);
+    virtual bool handleInputEvent(const WebInputEvent&);
+
+private:
+    bool onMouseDown(const WebInputEvent& event);
+    bool onMouseUp(const WebInputEvent& event);
+    bool onMouseMove(const WebInputEvent& event);
+    bool onMouseLeave(const WebInputEvent& event);
+    bool onMouseWheel(const WebInputEvent& event);
+    bool onKeyDown(const WebInputEvent& event);
+
+    ScrollbarGroup* m_group;
+    WebScrollbarClient* m_client;
+
+    int m_scrollOffset;
+    RefPtr<WebCore::Scrollbar> m_scrollbar;
+};
+
+} // namespace WebKit
+
+#endif