diff -r 000000000000 -r 4f2f89ce4247 WebCore/rendering/LayoutState.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/LayoutState.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2007 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. ``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
+ * 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 LayoutState_h
+#define LayoutState_h
+
+#include "IntRect.h"
+#include "IntSize.h"
+#include <wtf/Noncopyable.h>
+
+namespace WebCore {
+
+class RenderArena;
+class RenderBox;
+class RenderObject;
+
+class LayoutState : public Noncopyable {
+public:
+    LayoutState()
+        : m_clipped(false)
+        , m_next(0)
+#ifndef NDEBUG
+        , m_renderer(0)
+#endif
+    {
+    }
+
+    LayoutState(LayoutState*, RenderBox*, const IntSize& offset);
+    LayoutState(RenderObject*);
+
+    void destroy(RenderArena*);
+
+    // Overloaded new operator.
+    void* operator new(size_t, RenderArena*) throw();
+
+    // Overridden to prevent the normal delete from being called.
+    void operator delete(void*, size_t);
+
+private:
+    // The normal operator new is disallowed.
+    void* operator new(size_t) throw();
+
+public:
+    bool m_clipped;
+    IntRect m_clipRect;
+    IntSize m_offset;       // x/y offset from container.
+    IntSize m_layoutDelta;  // Transient offset from the final position of the object
+                            // used to ensure that repaints happen in the correct place.
+                            // This is a total delta accumulated from the root.
+    LayoutState* m_next;
+#ifndef NDEBUG
+    RenderObject* m_renderer;
+#endif
+};
+
+} // namespace WebCore
+
+#endif // LayoutState_h