Begin tracking why layout is invalidated

Source/core/layout/LayoutTable.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, 2010 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 209 matching lines @@
             return 0;
         return slowColElement(col, startEdge, endEdge);
     }
 
     bool needsSectionRecalc() const { return m_needsSectionRecalc; }
     void setNeedsSectionRecalc()
     {
         if (documentBeingDestroyed())
             return;
         m_needsSectionRecalc = true;
-        setNeedsLayoutAndFullPaintInvalidation();
+        setNeedsLayoutAndFullPaintInvalidation(LayoutInvalidationReason::TableChanged);
     }
 
     LayoutTableSection* sectionAbove(const LayoutTableSection*, SkipEmptySectionsValue = DoNotSkipEmptySections) const;
     LayoutTableSection* sectionBelow(const LayoutTableSection*, SkipEmptySectionsValue = DoNotSkipEmptySections) const;
 
     LayoutTableCell* cellAbove(const LayoutTableCell*) const;
     LayoutTableCell* cellBelow(const LayoutTableCell*) const;
     LayoutTableCell* cellBefore(const LayoutTableCell*) const;
     LayoutTableCell* cellAfter(const LayoutTableCell*) const;
 
@@ skipping 120 matching lines @@
     if (m_firstBody)
         return m_firstBody;
     return m_foot;
 }
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTable, isTable());
 
 } // namespace blink
 
 #endif // LayoutTable_h