merge_pr_58980

[gap-decorations] Rename rule-visibility-items initial value from auto to normal

Per CSSWG resolution in
w3c/csswg-drafts#13477, the initial value of
rule-visibility-items is renamed from 'auto' to 'normal'. The keyword
'normal' resolves to 'all' for grid, and 'between' for multicol and flex
containers.

This follows the same pattern already used by rule-break: normal.

Change-Id: I957d917d3d56ab8072ee1df7452a13d6c0c861a4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7719758
Commit-Queue: Javier Contreras javiercon@microsoft.com
Reviewed-by: Alison Maher almaher@microsoft.com
Cr-Commit-Position: refs/heads/main@{#1610375}