diff -r 000000000000 -r 4f2f89ce4247 WebCore/rendering/RenderHTMLCanvas.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/RenderHTMLCanvas.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2004, 2006, 2007, 2009 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 COMPUTER, 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 RenderHTMLCanvas_h
+#define RenderHTMLCanvas_h
+
+#include "RenderReplaced.h"
+
+namespace WebCore {
+
+class HTMLCanvasElement;
+
+class RenderHTMLCanvas : public RenderReplaced {
+public:
+    RenderHTMLCanvas(HTMLCanvasElement*);
+
+    virtual bool isCanvas() const { return true; }
+    virtual bool requiresLayer() const;
+
+    void canvasSizeChanged();
+    
+private:
+    virtual const char* renderName() const { return "RenderHTMLCanvas"; }
+    virtual void paintReplaced(PaintInfo&, int tx, int ty);
+    virtual void intrinsicSizeChanged() { canvasSizeChanged(); }
+};
+
+inline RenderHTMLCanvas* toRenderHTMLCanvas(RenderObject* object)
+{
+    ASSERT(!object || !strcmp(object->renderName(), "RenderHTMLCanvas"));
+    return static_cast<RenderHTMLCanvas*>(object);
+}
+
+// This will catch anyone doing an unnecessary cast.
+void toRenderHTMLCanvas(const RenderHTMLCanvas*);
+
+} // namespace WebCore
+
+#endif // RenderHTMLCanvas_h