[heap] Visit all large fixed arrays incrementally

This makes the stop-the-world marking visitor the same as incremental
visitor for processing large fixed arrays.

Bug: chromium:1020982
Change-Id: Ie3b4ea7ad397ea0ae00000875aca0d142f672a3f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1897828Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64743}

src/heap/mark-compact-inl.h

@@ -91,9 +91,7 @@ template <FixedArrayVisitationMode fixed_array_mode,
           TraceRetainingPathMode retaining_path_mode, typename MarkingState>
 int MarkingVisitor<fixed_array_mode, retaining_path_mode,
                    MarkingState>::VisitFixedArray(Map map, FixedArray object) {
-  return (fixed_array_mode == FixedArrayVisitationMode::kRegular)
-             ? Parent::VisitFixedArray(map, object)
-             : VisitFixedArrayIncremental(map, object);
+  return VisitFixedArrayIncremental(map, object);
 }
 
 template <FixedArrayVisitationMode fixed_array_mode,