Begin tracking why layout is invalidated

Source/core/layout/LayoutTableSection.cpp

 /*
  * 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, 2008, 2009, 2010, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1387 matching lines @@
 
         m_grid[insertionRow].rowRenderer = row;
         row->setRowIndex(insertionRow);
         setRowLogicalHeightToRowStyleLogicalHeight(m_grid[insertionRow]);
 
         for (LayoutTableCell* cell = row->firstCell(); cell; cell = cell->nextCell())
             addCell(cell, row);
     }
 
     m_grid.shrinkToFit();
-    setNeedsLayoutAndFullPaintInvalidation();
+    setNeedsLayoutAndFullPaintInvalidation(LayoutInvalidationReason::Unknown);
 }
 
 // FIXME: This function could be made O(1) in certain cases (like for the non-most-constrainive cells' case).
 void LayoutTableSection::rowLogicalHeightChanged(LayoutTableRow* row)
 {
     if (needsCellRecalc())
         return;
 
     unsigned rowIndex = row->rowIndex();
     setRowLogicalHeightToRowStyleLogicalHeight(m_grid[rowIndex]);
@@ skipping 189 matching lines @@
     // FIXME: The table's direction should determine our row's direction, not the section's (see bug 96691).
     if (!style()->isLeftToRightDirection())
         cellLocation.setX(table()->columnPositions()[table()->numEffCols()] - table()->columnPositions()[table()->colToEffCol(cell->col() + cell->colSpan())] + horizontalBorderSpacing);
     else
         cellLocation.setX(table()->columnPositions()[effectiveColumn] + horizontalBorderSpacing);
 
     cell->setLogicalLocation(cellLocation);
 }
 
 } // namespace blink