GitLab

Apply the tab selected state color into account in order to calculate the
proper contrast for the tab's text and icons.

Bug: 876794
Change-Id: Ie0db7e6eb5cd93c7b7d34098c88e9f06ff355d4d
Reviewed-on: https://chromium-review.googlesource.com/1188434
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#585996}