Rename WeakHashSet::computesEmpty to WeakHashSet::isEmptyIgnoringNullReferences to match WeakHashMap.
Pull request: https://github.com/WebKit/WebKit/pull/9071
Committed 259339@main (eeb55349e833): <https://commits.webkit.org/259339@main> Reviewed commits have been landed. Closing PR #9071 and removing active labels.
<rdar://problem/104632297>