Rename FormNamedItem to FormAssociatedElement since it corresponds to the concept of the same name in HTML5: https://html.spec.whatwg.org/multipage/forms.html#form-associated-element
Pull request: https://github.com/WebKit/WebKit/pull/6484
Committed 256678@main (b8989c738ff4): <https://commits.webkit.org/256678@main> Reviewed commits have been landed. Closing PR #6484 and removing active labels.
<rdar://problem/102342877>