Fix the preferred logical widths code to work with spanning grid items

Source/core/rendering/RenderGrid.h

Index: Source/core/rendering/RenderGrid.h
diff --git a/Source/core/rendering/RenderGrid.h b/Source/core/rendering/RenderGrid.h
index 7607fcf20c3cc1c17c7ccd92f5ae84b1eb75f2aa..9071e6a208b2182325e6ce2e3106a9e52f9dd493 100644
--- a/Source/core/rendering/RenderGrid.h
+++ b/Source/core/rendering/RenderGrid.h
@@ -69,12 +69,11 @@ private:
     bool explicitGridDidResize(const RenderStyle*) const;
     bool namedGridLinesDefinitionDidChange(const RenderStyle*) const;
 
-    LayoutUnit computePreferredTrackWidth(const GridLength&, size_t) const;
-
     class GridIterator;
     class GridSizingData;
     enum TrackSizingDirection { ForColumns, ForRows };
     void computedUsedBreadthOfGridTracks(TrackSizingDirection, GridSizingData&);
+    void computedUsedBreadthOfGridTracks(TrackSizingDirection, GridSizingData&, LayoutUnit& availableLogicalSpace);
     LayoutUnit computeUsedBreadthOfMinLength(TrackSizingDirection, const GridLength&) const;
     LayoutUnit computeUsedBreadthOfMaxLength(TrackSizingDirection, const GridLength&, LayoutUnit usedBreadth) const;
     LayoutUnit computeUsedBreadthOfSpecifiedLength(TrackSizingDirection, const Length&) const;