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diff --git a/Source/WebKit2/UIProcess/DrawingAreaProxyImpl.h b/Source/WebKit2/UIProcess/DrawingAreaProxyImpl.h
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+++ b/Source/WebKit2/UIProcess/DrawingAreaProxyImpl.h
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+/*
+ * Copyright (C) 2011 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. 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.
+ */
+
+#ifndef DrawingAreaProxyImpl_h
+#define DrawingAreaProxyImpl_h
+
+#include "BackingStore.h"
+#include "DrawingAreaProxy.h"
+
+namespace WebKit {
+
+class DrawingAreaProxyImpl : public DrawingAreaProxy {
+public:
+    static PassOwnPtr<DrawingAreaProxyImpl> create(WebPageProxy*);
+    virtual ~DrawingAreaProxyImpl();
+
+    void paint(BackingStore::PlatformGraphicsContext, const WebCore::IntRect&);
+
+private:
+    explicit DrawingAreaProxyImpl(WebPageProxy*);
+
+    // DrawingAreaProxy
+    virtual void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*);
+    virtual void didReceiveSyncMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*, CoreIPC::ArgumentEncoder*);
+    virtual bool paint(const WebCore::IntRect&, PlatformDrawingContext);
+    virtual void sizeDidChange();
+    virtual void setPageIsVisible(bool);
+    virtual void attachCompositingContext(uint32_t contextID);
+    virtual void detachCompositingContext();
+
+    // CoreIPC message handlers
+    virtual void update(const UpdateInfo&);
+    virtual void didSetSize();
+    
+    void incorporateUpdate(const UpdateInfo&);
+    void sendSetSize();
+
+    OwnPtr<BackingStore> m_backingStore;
+};
+
+} // namespace WebKit
+
+#endif // DrawingAreaProxyImpl_h