DOM: Enable moveBefore() inside ShadowRoot DocumentFragments
This CL enables moveBefore() inside connected ShadowRoot
DocumentFragments, as the general only-Element-node target parent
pre-condition was too strict, and disabled this case, despite it being
a pretty valid one.
This was discussed in
whatwg/dom#1307 (comment).
Bug: 40150299
Change-Id: Ie9c6e31400b75b2b5d10d095c059012056a440da
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6012161
Commit-Queue: Dominic Farolino dom@chromium.org
Reviewed-by: Noam Rosenthal nrosenthal@chromium.org
Cr-Commit-Position: refs/heads/main@{#1381208}