ContainerNode::replaceChildren creates a dummy DocumentFragment during its course of child node replacement logic. Avoid this unnecessary work.
Pull request: https://github.com/WebKit/WebKit/pull/17328
<rdar://problem/114809376>
Committed 267565@main (c177199a72c0): <https://commits.webkit.org/267565@main> Reviewed commits have been landed. Closing PR #17328 and removing active labels.
Re-opened since this is blocked by bug 261766