Add fast path for Element::hideNonce(), for the common case where the element doesn't have a nonce attribute.
Pull request: https://github.com/WebKit/WebKit/pull/11190
Committed 261390@main (9712f3364bc9): <https://commits.webkit.org/261390@main> Reviewed commits have been landed. Closing PR #11190 and removing active labels.
<rdar://problem/106457881>