Make sure we invalidate the iterator in StorageMap::clear().
Created attachment 427294 [details] Patch
Committed r276737 (237138@main): <https://commits.webkit.org/237138@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 427294 [details].
<rdar://problem/77289437>
Re-opened since this is blocked by bug 225188
<https://commits.webkit.org/237158@main>