CSS parser does not handle unpaired surrogates correctly
We already had a function lying around that does the right thing so this was easy to fix.
Created attachment 432188 [details] Patch
Committed r279238 (239123@main): <https://commits.webkit.org/239123@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 432188 [details].
<rdar://problem/79734024>