[CSS Grid Layout] Support marking tracks as infinitely growable

Source/core/layout/LayoutGrid.h

Index: Source/core/layout/LayoutGrid.h
diff --git a/Source/core/layout/LayoutGrid.h b/Source/core/layout/LayoutGrid.h
index 811b12d2d951b692ec834f9975305b422d92c639..98c4e931f7aa012d0b393f2169b528fbc31a4eca 100644
--- a/Source/core/layout/LayoutGrid.h
+++ b/Source/core/layout/LayoutGrid.h
@@ -60,7 +60,7 @@ public:
 
     bool gridIsDirty() const { return m_gridIsDirty; }
 
-    typedef void (GridTrack::* AccumulatorGrowFunction)(LayoutUnit);
+    typedef void (GridTrack::* AccumulatorSetterFunction)(LayoutUnit);
 private:
     virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectLayoutGrid || LayoutBlock::isOfType(type); }
     virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const override;
@@ -104,7 +104,7 @@ private:
     typedef bool (GridTrackSize::* FilterFunction)() const;
     typedef struct GridItemsSpanGroupRange GridItemsSpanGroupRange;
     void resolveContentBasedTrackSizingFunctionsForNonSpanningItems(GridTrackSizingDirection, const GridCoordinate&, LayoutBox& gridItem, GridTrack&, Vector<GridTrack>& columnTracks);
-    void resolveContentBasedTrackSizingFunctionsForItems(GridTrackSizingDirection, GridSizingData&, const GridItemsSpanGroupRange&, FilterFunction, SizingFunction, AccumulatorGetter, AccumulatorGrowFunction, FilterFunction growAboveMaxBreadthFilterFunction = nullptr);
+    void resolveContentBasedTrackSizingFunctionsForItems(GridTrackSizingDirection, GridSizingData&, const GridItemsSpanGroupRange&, FilterFunction, SizingFunction, AccumulatorGetter trackGetter, AccumulatorGetter trackGetterIfNotInfinite, AccumulatorSetterFunction, FilterFunction growAboveMaxBreadthFilterFunction = nullptr);
     void distributeSpaceToTracks(Vector<GridTrack*>&, const Vector<GridTrack*>* growBeyondGrowthLimitsTracks, AccumulatorGetter, GridSizingData&, LayoutUnit& availableLogicalSpace);
 
     double computeNormalizedFractionBreadth(Vector<GridTrack>&, const GridSpan& tracksSpan, GridTrackSizingDirection, LayoutUnit availableLogicalSpace) const;