Store physical location in LayoutTableRow, just like in all other objects.

third_party/WebKit/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 1075 matching lines @@
           view()->layoutState()->heightOffsetForTableHeaders());
   }
 
   LayoutState state(*this, locationOffset());
 
   for (unsigned r = 0; r < totalRows; r++) {
     // Set the row's x/y position and width/height.
     LayoutTableRow* rowLayoutObject = m_grid[r].rowLayoutObject;
     int paginationStrutOnRow = 0;
     if (rowLayoutObject) {
-      rowLayoutObject->setLocation(LayoutPoint(0, m_rowPos[r]));
+      rowLayoutObject->setLogicalLocation(LayoutPoint(0, m_rowPos[r]));
       rowLayoutObject->setLogicalWidth(logicalWidth());
       rowLayoutObject->setLogicalHeight(
           LayoutUnit(m_rowPos[r + 1] - m_rowPos[r] - vspacing));
       rowLayoutObject->updateLayerTransformAfterLayout();
       if (isPaginated) {
         paginationStrutOnRow =
             paginationStrutForRow(rowLayoutObject, LayoutUnit(m_rowPos[r]));
         rowLayoutObject->setPaginationStrut(LayoutUnit(paginationStrutOnRow));
         if (paginationStrutOnRow) {
           // If there isn't room for at least one content row on a page with a header group, then
@@ skipping 825 matching lines @@
   // Repeating table headers are painted once per fragmentation page/column. This does not go through the regular fragmentation machinery,
   // so we need special code to expand the invalidation rect to contain all positions of the header in all columns.
   // Note that this is in flow thread coordinates, not visual coordinates. The enclosing LayoutFlowThread will convert to visual coordinates.
   if (table()->header() == this && isRepeatingHeaderGroup())
     rect.setHeight(table()->logicalHeight());
   return LayoutTableBoxComponent::mapToVisualRectInAncestorSpace(ancestor, rect,
                                                                  flags);
 }
 
 }  // namespace blink