DOM: Flag-guard moveBefore()'s range and selection preservation
Per discussion in whatwg/dom#1307, we've
decided to not ship range and selection preservation initially. Since
this was mostly implemented in Chromium, this CL flag-gaurds our
implementation of that preservation (so it does not ship along with
the rest of the API's side-effects) and updates the tests.
Bug: 40150299
Change-Id: Ia4412d95859497593ac2e4d9e9b87dfc36240ef4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6022661
Reviewed-by: Noam Rosenthal nrosenthal@chromium.org
Commit-Queue: Dominic Farolino dom@chromium.org
Cr-Commit-Position: refs/heads/main@{#1385070}