[css-grid] Cache definite height detection

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

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 202 matching lines @@
 
     size_t gridItemSpan(const LayoutBox&, GridTrackSizingDirection);
     bool spanningItemCrossesFlexibleSizedTracks(const GridSpan&, GridTrackSizingDirection, SizingOperation) const;
 
     size_t gridColumnCount() const;
     size_t gridRowCount() const;
 
     bool isOrthogonalChild(const LayoutBox&) const;
     GridTrackSizingDirection flowAwareDirectionForChild(const LayoutBox&, GridTrackSizingDirection) const;
 
+    bool cachedHasDefiniteLogicalHeight() const;
+
     typedef Vector<Vector<GridCell>> GridRepresentation;
     GridRepresentation m_grid;
     bool m_gridIsDirty;
     Vector<LayoutUnit> m_rowPositions;
     Vector<LayoutUnit> m_columnPositions;
     LayoutUnit m_offsetBetweenColumns;
     LayoutUnit m_offsetBetweenRows;
     HashMap<const LayoutBox*, GridArea> m_gridItemArea;
     OrderIterator m_orderIterator;
     Vector<LayoutBox*> m_gridItemsOverflowingGridArea;
     HashMap<const LayoutBox*, size_t> m_gridItemsIndexesMap;
 
     LayoutUnit m_minContentHeight { -1 };
     LayoutUnit m_maxContentHeight { -1 };
 
     int m_smallestRowStart;
     int m_smallestColumnStart;
 
     size_t m_autoRepeatColumns { 0 };
     size_t m_autoRepeatRows { 0 };
 
     bool m_hasAnyOrthogonalChild;
 
     std::unique_ptr<OrderedTrackIndexSet> m_autoRepeatEmptyColumns { nullptr };
     std::unique_ptr<OrderedTrackIndexSet> m_autoRepeatEmptyRows { nullptr };
+
+    Optional<bool> m_hasDefiniteLogicalHeight;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutGrid, isLayoutGrid());
 
 } // namespace blink
 
 #endif // LayoutGrid_h