Improve LayoutTable outer collapsed border calculation

third_party/WebKit/Source/core/layout/LayoutTableCell.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, 2007, 2009, 2013 Apple Inc.
  *               All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 339 matching lines @@
   bool HasLineIfEmpty() const override;
 
   static bool CompareInDOMOrder(const LayoutTableCell* cell1,
                                 const LayoutTableCell* cell2) {
     DCHECK(cell1->Section() == cell2->Section());
     if (cell1->RowIndex() == cell2->RowIndex())
       return cell1->absolute_column_index_ < cell2->absolute_column_index_;
     return cell1->RowIndex() < cell2->RowIndex();
   }
 
+  // For LayoutTable to compute its collapsed outer borders.
+  unsigned CollapsedOuterBorderBefore() const {
+    return CollapsedBorderHalfBefore(true);
+  }
+  unsigned CollapsedOuterBorderAfter() const {
+    return CollapsedBorderHalfAfter(true);
+  }
+  unsigned CollapsedOuterBorderStart() const {
+    return CollapsedBorderHalfStart(true);
+  }
+  unsigned CollapsedOuterBorderEnd() const {
+    return CollapsedBorderHalfEnd(true);
+  }
+
  protected:
   void StyleDidChange(StyleDifference, const ComputedStyle* old_style) override;
   void ComputePreferredLogicalWidths() override;
 
   void AddLayerHitTestRects(LayerHitTestRects&,
                             const PaintLayer* current_composited_layer,
                             const LayoutPoint& layer_offset,
                             const LayoutRect& container_rect) const override;
 
   PaintInvalidationReason InvalidatePaint(
@@ skipping 14 matching lines @@
   void PaintBoxDecorationBackground(const PaintInfo&,
                                     const LayoutPoint&) const override;
   void PaintMask(const PaintInfo&, const LayoutPoint&) const override;
 
   LayoutSize OffsetFromContainer(const LayoutObject*) const override;
 
   void ComputeOverflow(LayoutUnit old_client_after_edge,
                        bool recompute_floats = false) override;
   LayoutRect LocalVisualRect() const override;
 
-  LayoutUnit CollapsedBorderHalfLeft(bool outer) const;
-  LayoutUnit CollapsedBorderHalfRight(bool outer) const;
-  LayoutUnit CollapsedBorderHalfTop(bool outer) const;
-  LayoutUnit CollapsedBorderHalfBottom(bool outer) const;
+  unsigned CollapsedBorderHalfLeft(bool outer) const;
+  unsigned CollapsedBorderHalfRight(bool outer) const;
+  unsigned CollapsedBorderHalfTop(bool outer) const;
+  unsigned CollapsedBorderHalfBottom(bool outer) const;
 
-  LayoutUnit CollapsedBorderHalfStart(bool outer) const;
-  LayoutUnit CollapsedBorderHalfEnd(bool outer) const;
-  LayoutUnit CollapsedBorderHalfBefore(bool outer) const;
-  LayoutUnit CollapsedBorderHalfAfter(bool outer) const;
+  unsigned CollapsedBorderHalfStart(bool outer) const;
+  unsigned CollapsedBorderHalfEnd(bool outer) const;
+  unsigned CollapsedBorderHalfBefore(bool outer) const;
+  unsigned CollapsedBorderHalfAfter(bool outer) const;
 
   void SetIntrinsicPaddingBefore(int p) { intrinsic_padding_before_ = p; }
   void SetIntrinsicPaddingAfter(int p) { intrinsic_padding_after_ = p; }
   void SetIntrinsicPadding(int before, int after) {
     SetIntrinsicPaddingBefore(before);
     SetIntrinsicPaddingAfter(after);
   }
 
   inline bool IsInStartColumn() const;
   inline bool IsInEndColumn() const;
@@ skipping 76 matching lines @@
   return ToLayoutTableCell(FirstChild());
 }
 
 inline LayoutTableCell* LayoutTableRow::LastCell() const {
   return ToLayoutTableCell(LastChild());
 }
 
 }  // namespace blink
 
 #endif  // LayoutTableCell_h