Leverage jsNontrivialString() in LiteralParser<CharType>::makeJSString().
Pull request: https://github.com/WebKit/WebKit/pull/11979
Committed 262169@main (6485d967ac75): <https://commits.webkit.org/262169@main> Reviewed commits have been landed. Closing PR #11979 and removing active labels.
<rdar://problem/107279590>