[css-grid] Clearing override sizes before running grid's layout logic.

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 330 matching lines @@
 
   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;
+  Vector<LayoutBox*> m_orthogonalChildren;
 
   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