GitLab

Set the UseWindowsSystemColors and LinkSystemColors flags to stable
and update test expectations.

Spec: https://drafts.csswg.org/css-color-4/#css-system-colors

Bug: 970285
Change-Id: I1c65b09cbec6a6408c0056ac2f088df2bdcd9f4b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1829645
Commit-Queue: Alison Maher <almaher@microsoft.com>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702152}