Build without ContentExtensions is broken since r241790 because of API::ContentRuleList usage in WebKitUserContent* API files.
Pull request: https://github.com/WebKit/WebKit/pull/834
Committed 251866@main (8484c9ba1afe): <https://commits.webkit.org/251866@main> Reviewed commits have been landed. Closing PR #834 and removing active labels.