Add WebDX feature mapping for transform-box.
Change-Id: Ife2d6540b489df97749a1c7ca8e241769e7b6251
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6002654
Reviewed-by: Shunya Shishido sisidovski@chromium.org
Commit-Queue: Steinar H Gunderson sesse@chromium.org
Reviewed-by: Rune Lillesveen futhark@chromium.org
Cr-Commit-Position: refs/heads/main@{#1380342}