*** FOR PROTOTYPE PURPOSES ONLY! NOT INTENDED FOR COMMIT! ***

Source/core/rendering/RenderListItem.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  *
  * 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.
@@ skipping 297 matching lines @@
             // If the marker is inside we need to redo the preferred width calculations
             // as the size of the item now includes the size of the list marker.
             if (m_marker->isInside())
                 containingBlock()->updateLogicalWidth();
         }
     }
 }
 
 void RenderListItem::layout()
 {
+    internalLayout(true);
+}
+
+void RenderListItem::preLayout()
+{
+    internalLayout(false);
+}
+
+void RenderListItem::internalLayout(bool fullLayout)
+{
     ASSERT(needsLayout());
 
     // The marker must be autosized before calling updateMarkerLocation.
     // It cannot be done in the parent's beginLayout because it is not yet in the render tree.
     FastTextAutosizer* textAutosizer = document().fastTextAutosizer();
     if (textAutosizer)
         textAutosizer->inflateListItem(this, m_marker);
 
     LayoutRectRecorder recorder(*this);
     updateMarkerLocation();
-    RenderBlockFlow::layout();
+    if (fullLayout)
+        RenderBlockFlow::layout(); // this will traverse children...
+    else
+        RenderBlockFlow::preLayout();
+}
+
+void RenderListItem::postLayout()
+{
+    RenderBlockFlow::postLayout();
 }
 
 void RenderListItem::addOverflowFromChildren()
 {
     RenderBlockFlow::addOverflowFromChildren();
     positionListMarker();
 }
 
 void RenderListItem::positionListMarker()
 {
@@ skipping 185 matching lines @@
             // assume that all the following ones have too.
             // This gives us the opportunity to stop here and avoid
             // marking the same nodes again.
             break;
         }
         item->updateValue();
     }
 }
 
 } // namespace WebCore