Use Ref<> for MatchedProperties::properties instead of RefPtr<>, to make it clear it cannot be null.
Pull request: https://github.com/WebKit/WebKit/pull/15724
Committed 265936@main (f1c09f61e0a0): <https://commits.webkit.org/265936@main> Reviewed commits have been landed. Closing PR #15724 and removing active labels.
<rdar://problem/112057657>