Improve LayoutTable outer collapsed border calculation

third_party/WebKit/Source/core/layout/LayoutTableCell.h

Index: third_party/WebKit/Source/core/layout/LayoutTableCell.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutTableCell.h b/third_party/WebKit/Source/core/layout/LayoutTableCell.h
index da64479afd32db6563e2f8d18e5cb442e7e5b726..e4e771f28189374f13f69f392a9a721317479bb9 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTableCell.h
+++ b/third_party/WebKit/Source/core/layout/LayoutTableCell.h
@@ -357,6 +357,20 @@ class CORE_EXPORT LayoutTableCell final : public LayoutBlockFlow {
     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;
@@ -391,15 +405,15 @@ class CORE_EXPORT LayoutTableCell final : public LayoutBlockFlow {
                        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; }