Extract LayoutTableSection::CellStruct to a standalone class TableGridCell

third_party/WebKit/Source/core/paint/TableSectionPainter.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/paint/TableSectionPainter.h"
 
 #include "core/layout/LayoutTableCell.h"
 #include "core/layout/LayoutTableCol.h"
 #include "core/layout/LayoutTableRow.h"
 #include "core/paint/BoxClipper.h"
@@ skipping 259 matching lines @@
       // TODO(crbug.com/577282): This painting order is inconsistent with other
       // outlines.
       if (row && !row->HasSelfPaintingLayer() &&
           ShouldPaintSelfOutline(paint_info_for_descendants.phase)) {
         TableRowPainter(*row).PaintOutline(paint_info_for_descendants,
                                            paint_offset);
       }
       unsigned n_cols = layout_table_section_.NumCols(r);
       for (unsigned c = dirtied_columns.Start();
            c < n_cols && c < dirtied_columns.end(); c++) {
-        const auto& cell_struct = layout_table_section_.CellAt(r, c);
-        for (const auto* cell : cell_struct.cells) {
+        for (const auto* cell :
+             layout_table_section_.GridCellAt(r, c).Cells()) {
           if (overflowing_cells.Contains(cell))
             continue;
           if (cell->RowSpan() > 1 || cell->ColSpan() > 1) {
             if (!spanning_cells.insert(cell).is_new_entry)
               continue;
           }
           cells.push_back(cell);
         }
       }
     }
@@ skipping 110 matching lines @@
                                     const PaintInfo& paint_info_for_cells,
                                     const LayoutPoint& paint_offset) {
   if (!cell.HasSelfPaintingLayer() && !cell.Row()->HasSelfPaintingLayer()) {
     LayoutPoint cell_point =
         layout_table_section_.FlipForWritingModeForChild(&cell, paint_offset);
     cell.Paint(paint_info_for_cells, cell_point);
   }
 }
 
 }  // namespace blink