Let table row and section's self visual overflow cover whole collapsed borders

third_party/WebKit/Source/core/layout/LayoutTableSection.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, 2013 Apple Inc. All rights
  * reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 103 matching lines @@
   void AddChild(LayoutObject* child,
                 LayoutObject* before_child = nullptr) override;
 
   int FirstLineBoxBaseline() const override;
 
   void AddCell(LayoutTableCell*, LayoutTableRow*);
 
   int VBorderSpacingBeforeFirstRow() const;
   int CalcRowLogicalHeight();
   void LayoutRows();
-  void ComputeOverflowFromCells();
+  void ComputeOverflowFromDescendants();
   bool RecalcChildOverflowAfterStyleChange();
 
   void MarkAllCellsWidthsDirtyAndOrNeedsLayout(LayoutTable::WhatToMarkAllCells);
 
   LayoutTable* Table() const { return ToLayoutTable(Parent()); }
 
   typedef Vector<LayoutTableCell*, 2> SpanningLayoutTableCells;
 
   // CellStruct represents the cells that occupy an (N, M) position in the
   // table grid.
@@ skipping 290 matching lines @@
 
   void UpdateBaselineForCell(LayoutTableCell*,
                              unsigned row,
                              int& baseline_descent);
 
   bool HasOverflowingCell() const {
     return overflowing_cells_.size() ||
            force_slow_paint_path_with_overflowing_cell_;
   }
 
-  void ComputeOverflowFromCells(unsigned total_rows, unsigned n_eff_cols);
-
   // These two functions take a rectangle as input that has been flipped by
   // logicalRectForWritingModeAndDirection.
   // The returned span of rows or columns is end-exclusive, and empty if
   // start==end.
   CellSpan SpannedRows(const LayoutRect& flipped_rect) const;
   CellSpan SpannedEffectiveColumns(const LayoutRect& flipped_rect) const;
 
   void SetLogicalPositionForCell(LayoutTableCell*,
                                  unsigned effective_column) const;
 
@@ skipping 56 matching lines @@
 
   // Whether any cell spans multiple rows or cols.
   bool has_spanning_cells_;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTableSection, IsTableSection());
 
 }  // namespace blink
 
 #endif  // LayoutTableSection_h