GitLab

Fix bug where login shelf buttons background color constant and darken
wallpaper background color constant were combined incorrectly.

Bug: 1137798
Change-Id: Ib0584a990bcb40c4886ede2e402d2f8864705597
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2487831Reviewed-by: Toni Baržić <tbarzic@chromium.org>
Reviewed-by: Min Chen <minch@chromium.org>
Reviewed-by: Yulun Wu <yulunwu@chromium.org>
Commit-Queue: Yulun Wu <yulunwu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819153}