Correct @page margin % resolution in vertical writing modes.
Bug: 40286153
Change-Id: I440140793a3b716bf3024af98f8e489a5949ba4f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5591694
Reviewed-by: Ian Kilpatrick ikilpatrick@chromium.org
Commit-Queue: Morten Stenshorne mstensho@chromium.org
Cr-Commit-Position: refs/heads/main@{#1309512}