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diff --git a/Source/WebKit2/UIProcess/qt/TiledDrawingAreaProxyQt.cpp b/Source/WebKit2/UIProcess/qt/TiledDrawingAreaProxyQt.cpp
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+++ b/Source/WebKit2/UIProcess/qt/TiledDrawingAreaProxyQt.cpp
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+/*
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
+ *
+ * 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. 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 INC. 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.
+ */
+
+#include "config.h"
+#include "TiledDrawingAreaProxy.h"
+
+#include "QtSGUpdateQueue.h"
+#include "qquickwebpage_p.h"
+#include "ShareableBitmap.h"
+#include "UpdateInfo.h"
+#include "WKAPICast.h"
+#include "WebPageProxy.h"
+
+using namespace WebCore;
+
+#define TILE_DEBUG_LOG
+
+namespace WebKit {
+
+void TiledDrawingAreaProxy::updateWebView(const Vector<IntRect>& paintedArea)
+{
+    // SG updates are triggered through QtSGUpdateQueue.
+}
+
+WebPageProxy* TiledDrawingAreaProxy::page()
+{
+    return m_webPageProxy;
+}
+
+void TiledDrawingAreaProxy::createTile(int tileID, const UpdateInfo& updateInfo)
+{
+    int nodeID = m_webView->sceneGraphUpdateQueue()->createTileNode(updateInfo.updateScaleFactor);
+    m_tileNodeMap.set(tileID, nodeID);
+    updateTile(tileID, updateInfo);
+}
+
+void TiledDrawingAreaProxy::updateTile(int tileID, const UpdateInfo& updateInfo)
+{
+    int nodeID = m_tileNodeMap.get(tileID);
+    ASSERT(nodeID);
+
+    RefPtr<ShareableBitmap> bitmap = ShareableBitmap::create(updateInfo.bitmapHandle);
+    // FIXME: We could avoid this copy by carying the ShareableBitmap all the way up to texture uploading.
+    // Currently won't work since the SharedMemory handle is owned by updateInfo.
+    QImage image(bitmap->createQImage().copy());
+    QRect sourceRect(0, 0, updateInfo.updateRectBounds.width(), updateInfo.updateRectBounds.height());
+    m_webView->sceneGraphUpdateQueue()->setNodeBackBuffer(nodeID, image, sourceRect, updateInfo.updateRectBounds);
+}
+
+void TiledDrawingAreaProxy::didRenderFrame()
+{
+    m_webView->sceneGraphUpdateQueue()->swapTileBuffers();
+}
+
+void TiledDrawingAreaProxy::removeTile(int tileID)
+{
+    int nodeID = m_tileNodeMap.take(tileID);
+    m_webView->sceneGraphUpdateQueue()->removeTileNode(nodeID);
+}
+
+} // namespace WebKit