Enable sticky positioning for table elements.

Source/core/rendering/RenderTableRow.h

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 87 matching lines @@
 
     virtual void willBeRemovedFromTree() OVERRIDE;
 
     virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0) OVERRIDE;
     virtual void layout() OVERRIDE;
     virtual LayoutRect clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const OVERRIDE;
     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE;
 
     virtual LayerType layerTypeRequired() const OVERRIDE
     {
-        if (hasTransform() || hasHiddenBackface() || hasClipPath() || createsGroup())
+        if (hasTransform() || hasHiddenBackface() || hasClipPath() || createsGroup() || isStickyPositioned())
             return NormalLayer;
 
         if (hasOverflowClip())
             return OverflowClipLayer;
 
         return NoLayer;
     }
 
     virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE;
 
     virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) OVERRIDE;
 
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
 
     RenderObjectChildList m_children;
     unsigned m_rowIndex : 31;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTableRow, isTableRow());
 
 } // namespace WebCore
 
 #endif // RenderTableRow_h