[css-grid] Constify track sizing algorithm

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

Index: third_party/WebKit/Source/core/layout/LayoutGrid.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutGrid.cpp b/third_party/WebKit/Source/core/layout/LayoutGrid.cpp
index 6d8864e4a0d6d97a786ebe9bb66b5cfebf6bd4b9..82ece97e74528777e36f0ef59a330b71898004ce 100644
--- a/third_party/WebKit/Source/core/layout/LayoutGrid.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutGrid.cpp
@@ -516,7 +516,7 @@ void LayoutGrid::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, Layo
     GridSizingData sizingData(gridColumnCount(), gridRowCount());
     sizingData.freeSpaceForDirection(ForColumns) = LayoutUnit();
     sizingData.sizingOperation = IntrinsicSizeComputation;
-    const_cast<LayoutGrid*>(this)->computeUsedBreadthOfGridTracks(ForColumns, sizingData, minLogicalWidth, maxLogicalWidth);
+    computeUsedBreadthOfGridTracks(ForColumns, sizingData, minLogicalWidth, maxLogicalWidth);
 
     LayoutUnit totalGuttersSize = guttersSize(ForColumns, sizingData.columnTracks.size());
     minLogicalWidth += totalGuttersSize;
@@ -567,7 +567,7 @@ static inline double normalizedFlexFraction(const GridTrack& track, double flexF
     return track.baseSize() / std::max<double>(1, flexFactor);
 }
 
-void LayoutGrid::computeUsedBreadthOfGridTracks(GridTrackSizingDirection direction, GridSizingData& sizingData, LayoutUnit& baseSizesWithoutMaximization, LayoutUnit& growthLimitsWithoutMaximization)
+void LayoutGrid::computeUsedBreadthOfGridTracks(GridTrackSizingDirection direction, GridSizingData& sizingData, LayoutUnit& baseSizesWithoutMaximization, LayoutUnit& growthLimitsWithoutMaximization) const
 {
     LayoutUnit& freeSpace = sizingData.freeSpaceForDirection(direction);
     const LayoutUnit initialFreeSpace = freeSpace;
@@ -840,7 +840,7 @@ bool LayoutGrid::isOrthogonalChild(const LayoutBox& child) const
     return child.isHorizontalWritingMode() != isHorizontalWritingMode();
 }
 
-LayoutUnit LayoutGrid::logicalHeightForChild(LayoutBox& child, GridSizingData& sizingData)
+LayoutUnit LayoutGrid::logicalHeightForChild(LayoutBox& child, GridSizingData& sizingData) const
 {
     GridTrackSizingDirection childBlockDirection = flowAwareDirectionForChild(child, ForRows);
     SubtreeLayoutScope layoutScope(child);
@@ -864,7 +864,7 @@ GridTrackSizingDirection LayoutGrid::flowAwareDirectionForChild(const LayoutBox&
     return !isOrthogonalChild(child) ? direction : (direction == ForColumns ? ForRows : ForColumns);
 }
 
-LayoutUnit LayoutGrid::minSizeForChild(LayoutBox& child, GridTrackSizingDirection direction, GridSizingData& sizingData)
+LayoutUnit LayoutGrid::minSizeForChild(LayoutBox& child, GridTrackSizingDirection direction, GridSizingData& sizingData) const
 {
     GridTrackSizingDirection childInlineDirection = flowAwareDirectionForChild(child, ForColumns);
     bool isRowAxis = direction == childInlineDirection;
@@ -885,7 +885,7 @@ LayoutUnit LayoutGrid::minSizeForChild(LayoutBox& child, GridTrackSizingDirectio
     return child.computeLogicalHeightUsing(MinSize, childMinSize, child.intrinsicLogicalHeight()) + child.marginLogicalHeight() + child.scrollbarLogicalHeight();
 }
 
-bool LayoutGrid::updateOverrideContainingBlockContentSizeForChild(LayoutBox& child, GridTrackSizingDirection direction, GridSizingData& sizingData)
+bool LayoutGrid::updateOverrideContainingBlockContentSizeForChild(LayoutBox& child, GridTrackSizingDirection direction, GridSizingData& sizingData) const
 {
     LayoutUnit overrideSize = gridAreaBreadthForChild(child, direction, sizingData);
     if (hasOverrideContainingBlockContentSizeForChild(child, direction) && overrideContainingBlockContentSizeForChild(child, direction) == overrideSize)
@@ -895,7 +895,7 @@ bool LayoutGrid::updateOverrideContainingBlockContentSizeForChild(LayoutBox& chi
     return true;
 }
 
-LayoutUnit LayoutGrid::minContentForChild(LayoutBox& child, GridTrackSizingDirection direction, GridSizingData& sizingData)
+LayoutUnit LayoutGrid::minContentForChild(LayoutBox& child, GridTrackSizingDirection direction, GridSizingData& sizingData) const
 {
     GridTrackSizingDirection childInlineDirection = flowAwareDirectionForChild(child, ForColumns);
     if (direction == childInlineDirection) {
@@ -924,7 +924,7 @@ LayoutUnit LayoutGrid::minContentForChild(LayoutBox& child, GridTrackSizingDirec
     return logicalHeightForChild(child, sizingData);
 }
 
-LayoutUnit LayoutGrid::maxContentForChild(LayoutBox& child, GridTrackSizingDirection direction, GridSizingData& sizingData)
+LayoutUnit LayoutGrid::maxContentForChild(LayoutBox& child, GridTrackSizingDirection direction, GridSizingData& sizingData) const
 {
     GridTrackSizingDirection childInlineDirection = flowAwareDirectionForChild(child, ForColumns);
     if (direction == childInlineDirection) {
@@ -986,7 +986,7 @@ bool LayoutGrid::spanningItemCrossesFlexibleSizedTracks(const GridSpan& span, Gr
     return false;
 }
 
-void LayoutGrid::resolveContentBasedTrackSizingFunctions(GridTrackSizingDirection direction, GridSizingData& sizingData)
+void LayoutGrid::resolveContentBasedTrackSizingFunctions(GridTrackSizingDirection direction, GridSizingData& sizingData) const
 {
     sizingData.itemsSortedByIncreasingSpan.shrink(0);
     if (!m_gridItemArea.isEmpty()) {
@@ -1027,7 +1027,7 @@ void LayoutGrid::resolveContentBasedTrackSizingFunctions(GridTrackSizingDirectio
     }
 }
 
-void LayoutGrid::resolveContentBasedTrackSizingFunctionsForNonSpanningItems(GridTrackSizingDirection direction, const GridSpan& span, LayoutBox& gridItem, GridTrack& track, GridSizingData& sizingData)
+void LayoutGrid::resolveContentBasedTrackSizingFunctionsForNonSpanningItems(GridTrackSizingDirection direction, const GridSpan& span, LayoutBox& gridItem, GridTrack& track, GridSizingData& sizingData) const
 {
     const size_t trackPosition = span.startLine();
     GridTrackSize trackSize = gridTrackSize(direction, trackPosition, sizingData.sizingOperation);
@@ -1150,7 +1150,7 @@ static void updateTrackSizeForTrackSizeComputationPhase(TrackSizeComputationPhas
     ASSERT_NOT_REACHED();
 }
 
-LayoutUnit LayoutGrid::currentItemSizeForTrackSizeComputationPhase(TrackSizeComputationPhase phase, LayoutBox& gridItem, GridTrackSizingDirection direction, GridSizingData& sizingData)
+LayoutUnit LayoutGrid::currentItemSizeForTrackSizeComputationPhase(TrackSizeComputationPhase phase, LayoutBox& gridItem, GridTrackSizingDirection direction, GridSizingData& sizingData) const
 {
     switch (phase) {
     case ResolveIntrinsicMinimums:
@@ -1171,7 +1171,7 @@ LayoutUnit LayoutGrid::currentItemSizeForTrackSizeComputationPhase(TrackSizeComp
 }
 
 template <TrackSizeComputationPhase phase>
-void LayoutGrid::resolveContentBasedTrackSizingFunctionsForItems(GridTrackSizingDirection direction, GridSizingData& sizingData, const GridItemsSpanGroupRange& gridItemsWithSpan)
+void LayoutGrid::resolveContentBasedTrackSizingFunctionsForItems(GridTrackSizingDirection direction, GridSizingData& sizingData, const GridItemsSpanGroupRange& gridItemsWithSpan) const
 {
     Vector<GridTrack>& tracks = (direction == ForColumns) ? sizingData.columnTracks : sizingData.rowTracks;
     for (const auto& trackIndex : sizingData.contentSizedTracksIndex) {
@@ -1232,7 +1232,7 @@ static bool sortByGridTrackGrowthPotential(const GridTrack* track1, const GridTr
 }
 
 template <TrackSizeComputationPhase phase>
-void LayoutGrid::distributeSpaceToTracks(Vector<GridTrack*>& tracks, const Vector<GridTrack*>* growBeyondGrowthLimitsTracks, GridSizingData& sizingData, LayoutUnit& availableLogicalSpace)
+void LayoutGrid::distributeSpaceToTracks(Vector<GridTrack*>& tracks, const Vector<GridTrack*>* growBeyondGrowthLimitsTracks, GridSizingData& sizingData, LayoutUnit& availableLogicalSpace) const
 {
     ASSERT(availableLogicalSpace >= 0);