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diff --git a/Source/WebKit2/UIProcess/LayerTreeCoordinatorProxy.h b/Source/WebKit2/UIProcess/LayerTreeCoordinatorProxy.h
new file mode 100644
index 000000000..b4e7b7ce2
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+++ b/Source/WebKit2/UIProcess/LayerTreeCoordinatorProxy.h
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+/*
+    Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies)
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#ifndef LayerTreeCoordinatorProxy_h
+#define LayerTreeCoordinatorProxy_h
+
+#if USE(UI_SIDE_COMPOSITING)
+
+#include "BackingStore.h"
+#include "DrawingAreaProxy.h"
+#include "Region.h"
+#include "SurfaceUpdateInfo.h"
+#include "WebLayerTreeInfo.h"
+#include <WebCore/GraphicsContext.h>
+#include <WebCore/GraphicsLayer.h>
+#include <WebCore/IntRect.h>
+#include <WebCore/IntSize.h>
+#include <WebCore/RunLoop.h>
+#include <WebCore/Timer.h>
+#include <wtf/Functional.h>
+#include <wtf/HashSet.h>
+
+class QSGNode;
+
+namespace WebKit {
+
+class WebLayerInfo;
+class WebLayerTreeRenderer;
+class WebLayerUpdateInfo;
+
+class LayerTreeCoordinatorProxy {
+public:
+    LayerTreeCoordinatorProxy(DrawingAreaProxy*);
+    virtual ~LayerTreeCoordinatorProxy();
+    void setCompositingLayerState(WebLayerID, const WebLayerInfo&);
+    void setCompositingLayerChildren(WebLayerID, const Vector<WebLayerID>&);
+#if ENABLE(CSS_FILTERS)
+    void setCompositingLayerFilters(WebLayerID, const WebCore::FilterOperations&);
+#endif
+    void deleteCompositingLayer(WebLayerID);
+    void setRootCompositingLayer(WebLayerID);
+    void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*);
+    void purgeGLResources();
+    void setContentsSize(const WebCore::FloatSize&);
+    void setVisibleContentsRect(const WebCore::IntRect&, float scale, const WebCore::FloatPoint& trajectory, const WebCore::FloatPoint& accurateVisibleContentsPosition);
+    void didRenderFrame();
+    void createTileForLayer(int layerID, int tileID, const WebCore::IntRect&, const SurfaceUpdateInfo&);
+    void updateTileForLayer(int layerID, int tileID, const WebCore::IntRect&, const SurfaceUpdateInfo&);
+    void removeTileForLayer(int layerID, int tileID);
+    void createDirectlyCompositedImage(int64_t, const WebKit::ShareableBitmap::Handle&);
+    void destroyDirectlyCompositedImage(int64_t);
+    void didReceiveLayerTreeCoordinatorProxyMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*);
+    void updateViewport();
+    void renderNextFrame();
+    void didChangeScrollPosition(const WebCore::IntPoint& position);
+    void syncCanvas(uint32_t id, const WebCore::IntSize& canvasSize, uint32_t graphicsSurfaceToken);
+    void purgeBackingStores();
+    WebLayerTreeRenderer* layerTreeRenderer() const { return m_renderer.get(); }
+
+protected:
+    void dispatchUpdate(const Function<void()>&);
+
+    DrawingAreaProxy* m_drawingAreaProxy;
+    RefPtr<WebLayerTreeRenderer> m_renderer;
+#if USE(GRAPHICS_SURFACE)
+    HashMap<uint32_t, RefPtr<ShareableSurface> > m_surfaces;
+#endif
+};
+
+}
+
+#endif
+
+#endif // LayerTreeCoordinatorProxy_h