It can now be represented through ListStyleType::Type::CounterStyle and implicitly converted via the style builder.
<rdar://problem/106791191>
Pull request: https://github.com/WebKit/WebKit/pull/11595
Committed 261742@main (4b7af7997b4d): <https://commits.webkit.org/261742@main> Reviewed commits have been landed. Closing PR #11595 and removing active labels.