Update PaintLayer size during layout, not after.

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

 /*
  * 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 338 matching lines @@
     track_sizing_algorithm_.Reset();
 
     if (Size() != previous_size)
       relayout_children = true;
 
     LayoutPositionedObjects(relayout_children || IsDocumentElement());
 
     ComputeOverflow(old_client_after_edge);
   }
 
-  UpdateLayerTransformAfterLayout();
   UpdateAfterLayout();
 
   ClearNeedsLayout();
 }
 
 LayoutUnit LayoutGrid::GridGap(GridTrackSizingDirection direction,
                                Optional<LayoutUnit> available_size) const {
   const Length& gap = direction == kForColumns ? StyleRef().GridColumnGap()
                                                : StyleRef().GridRowGap();
   return ValueForLength(gap, available_size.value_or(LayoutUnit()));
@@ skipping 2035 matching lines @@
   if (direction == kForRows)
     return grid.NumTracks(kForRows);
 
   return grid.NumTracks(kForRows)
              ? grid.NumTracks(kForColumns)
              : GridPositionsResolver::ExplicitGridColumnCount(
                    StyleRef(), grid.AutoRepeatTracks(kForColumns));
 }
 
 }  // namespace blink