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diff --git a/WebCore/platform/graphics/win/WebTiledLayer.h b/WebCore/platform/graphics/win/WebTiledLayer.h
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+++ b/WebCore/platform/graphics/win/WebTiledLayer.h
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+/*
+ * Copyright (C) 2010 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 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 WebTiledLayer_h
+#define WebTiledLayer_h
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "WebLayer.h"
+
+namespace WebCore {
+
+class WebTiledLayer : public WebLayer {
+public:
+    static PassRefPtr<WebTiledLayer> create(const CGSize& tileSize, GraphicsLayer* owner);
+
+    virtual ~WebTiledLayer();
+
+    virtual void setBounds(const CGRect&);
+
+protected:
+    WebTiledLayer(const CGSize& tileSize, GraphicsLayer* owner);
+
+    // Overridden from WKCACFLayer
+    virtual WKCACFLayer* internalSublayerAtIndex(int) const;
+    virtual int internalIndexOfSublayer(const WKCACFLayer*);
+
+    virtual size_t internalSublayerCount() const;
+    virtual void internalInsertSublayer(PassRefPtr<WKCACFLayer>, size_t index);
+
+    virtual void internalRemoveAllSublayers();
+    virtual void internalSetSublayers(const Vector<RefPtr<WKCACFLayer> >&);
+
+    virtual void internalSetNeedsDisplay(const CGRect* dirtyRect);
+
+private:
+    static void tileDisplayCallback(CACFLayerRef, CGContextRef);
+    void drawTile(CACFLayerRef, CGContextRef);
+
+    CGSize constrainedSize(const CGSize& size) const;
+
+    void addTile();
+    void removeTile();
+    CACFLayerRef tileAtIndex(int);
+    int tileCount() const;
+
+    void updateTiles();
+
+    CGSize m_tileSize;
+    CGSize m_constrainedSize;
+    RetainPtr<CACFLayerRef> m_tileParent;
+};
+
+}
+
+#endif // USE(ACCELERATED_COMPOSITING)
+
+#endif // WebTiledLayer_h