WebPage::mainFrameDidLayout() shouldn't try to trigger a nested layout update.
Pull request: https://github.com/WebKit/WebKit/pull/13509
Committed 263751@main (aa9c35538dcf): <https://commits.webkit.org/263751@main> Reviewed commits have been landed. Closing PR #13509 and removing active labels.
<rdar://problem/108983572>