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diff --git a/WebCore/platform/graphics/chromium/RenderSurfaceChromium.h b/WebCore/platform/graphics/chromium/RenderSurfaceChromium.h
new file mode 100644
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+++ b/WebCore/platform/graphics/chromium/RenderSurfaceChromium.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:
+ *
+ * 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 AND ITS 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 APPLE OR ITS 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 RenderSurfaceChromium_h
+#define RenderSurfaceChromium_h
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "FloatRect.h"
+#include "IntRect.h"
+#include "TransformationMatrix.h"
+#include <wtf/Noncopyable.h>
+
+namespace WebCore {
+
+class LayerRendererChromium;
+class LayerChromium;
+
+class RenderSurfaceChromium : public Noncopyable {
+    friend class LayerRendererChromium;
+public:
+    explicit RenderSurfaceChromium(LayerChromium*);
+    ~RenderSurfaceChromium();
+
+    void prepareContentsTexture();
+    void cleanupResources();
+
+    FloatPoint contentRectCenter() const { return FloatRect(m_contentRect).center(); }
+    IntRect contentRect() const { return m_contentRect; }
+
+private:
+    LayerRendererChromium* layerRenderer();
+
+    LayerChromium* m_owningLayer;
+    IntRect m_contentRect;
+    unsigned m_contentsTextureId;
+    float m_drawOpacity;
+    IntSize m_allocatedTextureSize;
+    TransformationMatrix m_drawTransform;
+    TransformationMatrix m_originTransform;
+    IntRect m_scissorRect;
+    Vector<LayerChromium*> m_layerList;
+};
+
+}
+#endif // USE(ACCELERATED_COMPOSITING)
+
+#endif