[GridNG] Decouple ComputeUsedTrackSizes to be used within subgrids

1. Separating the cache logic in `ComputeUsedTrackSizes` to be handled
   by a new method `CompleteTrackSizingAlgorithm`. The purpose of this
   change is to reuse the core track sizing algorithm to both, finalize
   the grid tree geometry and compute the contribution size of subgrids.

2. Updating `GridItemData` to cache the `has_subgridded_[columns|rows]`
   properties relative to its parent grid's direction.

3. Adding some minor quality of life changes in preparation for an
   upcoming change that will expand `CompleteTrackSizingAlgorithm` to
   make it work for multiple levels of subgrids.

Bug: 618969
Change-Id: I505b333b1ea59ae286964920483c26c959e8594b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4370637
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Commit-Queue: Ethan Jimenez <ethavar@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#1122209}

third_party/blink/renderer/core/layout/ng/grid/ng_grid_item.cc

@@ -177,23 +177,24 @@ GridItemData::GridItemData(
 
   if (node.IsGrid()) {
     // TODO(ethavar): Don't consider subgrids with size containment.
-    has_subgridded_columns = style.GridTemplateColumns().IsSubgriddedAxis();
-    has_subgridded_rows = style.GridTemplateRows().IsSubgriddedAxis();
+    has_subgridded_columns =
+        is_parallel_with_root_grid
+            ? style.GridTemplateColumns().IsSubgriddedAxis()
+            : style.GridTemplateRows().IsSubgriddedAxis();
+
+    has_subgridded_rows = is_parallel_with_root_grid
+                              ? style.GridTemplateRows().IsSubgriddedAxis()
+                              : style.GridTemplateColumns().IsSubgriddedAxis();
   }
 
   if (parent_must_consider_grid_items_for_column_sizing) {
-    is_considered_for_column_sizing = is_parallel_with_root_grid
-                                          ? !has_subgridded_columns
-                                          : !has_subgridded_rows;
-    must_consider_grid_items_for_column_sizing =
-        !is_considered_for_column_sizing;
+    must_consider_grid_items_for_column_sizing = has_subgridded_columns;
+    is_considered_for_column_sizing = !has_subgridded_columns;
   }
 
   if (parent_must_consider_grid_items_for_row_sizing) {
-    is_considered_for_row_sizing = is_parallel_with_root_grid
-                                       ? !has_subgridded_rows
-                                       : !has_subgridded_columns;
-    must_consider_grid_items_for_row_sizing = !is_considered_for_row_sizing;
+    must_consider_grid_items_for_row_sizing = has_subgridded_rows;
+    is_considered_for_row_sizing = !has_subgridded_rows;
   }
 }
 

third_party/blink/renderer/core/layout/ng/grid/ng_grid_item.h

@@ -58,6 +58,11 @@ struct CORE_EXPORT GridItemData {
 
   bool IsBaselineAlignedForDirection(
       GridTrackSizingDirection track_direction) const {
+    // TODO(ethavar): Baseline alignment for subgrids is dependent on
+    // accumulating the baseline in `ComputeSubgridContributionSize`.
+    if (has_subgridded_columns || has_subgridded_rows) {
+      return false;
+    }
     return (track_direction == kForColumns)
                ? (InlineAxisAlignment() == AxisEdge::kFirstBaseline ||
                   InlineAxisAlignment() == AxisEdge::kLastBaseline)
@@ -67,6 +72,11 @@ struct CORE_EXPORT GridItemData {
 
   bool IsBaselineSpecifiedForDirection(
       GridTrackSizingDirection track_direction) const {
+    // TODO(ethavar): Baseline alignment for subgrids is dependent on
+    // accumulating the baseline in `ComputeSubgridContributionSize`.
+    if (has_subgridded_columns || has_subgridded_rows) {
+      return false;
+    }
     return (track_direction == kForColumns)
                ? (inline_axis_alignment == AxisEdge::kFirstBaseline ||
                   inline_axis_alignment == AxisEdge::kLastBaseline)