Another page margin box paint order test.
It should render identically to paint-order-001. The only difference in
the source is the specification order of the margin boxes, which
shouldn't make any difference.
See https://drafts.csswg.org/css-page-3/#painting for margin box "tree
order".
Bug: 40341678
Change-Id: Id95eb087361bb1063495d5f967774b72d01bc743
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5827537
Reviewed-by: Ian Kilpatrick ikilpatrick@chromium.org
Commit-Queue: Morten Stenshorne mstensho@chromium.org
Cr-Commit-Position: refs/heads/main@{#1349322}