Handle nested position:sticky elements

third_party/WebKit/Source/core/layout/LayoutTableCell.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, 2007, 2009, 2013 Apple Inc.
  *               All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 356 matching lines @@
   }
 
   void willBeRemovedFromTree() override;
 
   void updateLogicalWidth() override;
 
   void paintBoxDecorationBackground(const PaintInfo&,
                                     const LayoutPoint&) const override;
   void paintMask(const PaintInfo&, const LayoutPoint&) const override;
 
-  LayoutSize offsetFromContainer(const LayoutObject*) const override;
+  LayoutSize offsetFromContainer(const LayoutObject*,
+                                 bool ignoreSticky = false) const override;
   LayoutRect localVisualRect() const override;
 
   int borderHalfLeft(bool outer) const;
   int borderHalfRight(bool outer) const;
   int borderHalfTop(bool outer) const;
   int borderHalfBottom(bool outer) const;
 
   int borderHalfStart(bool outer) const;
   int borderHalfEnd(bool outer) const;
   int borderHalfBefore(bool outer) const;
@@ skipping 81 matching lines @@
   return toLayoutTableCell(firstChild());
 }
 
 inline LayoutTableCell* LayoutTableRow::lastCell() const {
   return toLayoutTableCell(lastChild());
 }
 
 }  // namespace blink
 
 #endif  // LayoutTableCell_h