commit bd37ad542355bd70b20e5fa704b5094a76454042
author Rune Lillesveen <futhark@chromium.org> Mon Aug 26 15:58:07 2019
committer Commit Bot <commit-bot@chromium.org> Mon Aug 26 15:58:07 2019
tree b0d9741114d812ca819886388b7c1a2087353fb8
parent 52236e1436092886f2e2af39a37f83394b676ebe

Pass used color-scheme to SystemColor.

System colors should resolve differently based on the used color-scheme
value. See [1]. Ideally they should compute to the keyword to make
inheritance work and have different used values for system colors based
on color-scheme, but that needs to be resolved[2].

System colors are used for forms rendering. This CL is preparing for
color-scheme specific forms rendering.

Some places we use initial color-scheme in contexts where we have no
ComputedStyle. These are typically offscreen canvas not connected to a
particular element. It's possible we should use the root element
computed value instead.

The color interpolation needs to be fixed and I've added a TODO. Will
follow up in another CL.

No tests as there are no behavioral changes.

[1] https://github.com/w3c/csswg-drafts/issues/3804
[2] https://github.com/w3c/csswg-drafts/issues/3847

Bug: 929098
Change-Id: Ie734e399c0dba82c59b221222c8e7ef365cae79b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1768139
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Reviewed-by: Fernando Serboncini <fserb@chromium.org>
Commit-Queue: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#690375}