Avoid unnecessary cell layout on nested percent height tables

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 314 matching lines @@
     return m_offsetForRepeatingHeader;
   }
 
   bool mapToVisualRectInAncestorSpace(
       const LayoutBoxModelObject* ancestor,
       LayoutRect&,
       VisualRectFlags = DefaultVisualRectFlags) const override;
 
   bool isRepeatingHeaderGroup() const;
 
+  void layout() override;
+
  protected:
   void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
   bool nodeAtPoint(HitTestResult&,
                    const HitTestLocation& locationInContainer,
                    const LayoutPoint& accumulatedOffset,
                    HitTestAction) override;
 
  private:
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectTableSection || LayoutBox::isOfType(type);
   }
 
   void willBeRemovedFromTree() override;
 
-  void layout() override;
-
   int borderSpacingForRow(unsigned row) const {
     return m_grid[row].rowLayoutObject ? table()->vBorderSpacing() : 0;
   }
 
   void ensureRows(unsigned);
 
   bool rowHasOnlySpanningCells(unsigned);
   unsigned calcRowHeightHavingOnlySpanningCells(unsigned,
                                                 int&,
                                                 unsigned,
@@ skipping 111 matching lines @@
   bool m_hasMultipleCellLevels;
 
   LayoutUnit m_offsetForRepeatingHeader;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTableSection, isTableSection());
 
 }  // namespace blink
 
 #endif  // LayoutTableSection_h