GitLab

Adds a mechanism for skipping the opacity check to
Label and applies it to the tab title label.

Bug: 1139395
Change-Id: I1c182b735964856be971d59af1c28ab29011d99c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2518277
Commit-Queue: Taylor Bergquist <tbergquist@chromium.org>
Reviewed-by: Collin Baker <collinbaker@chromium.org>
Reviewed-by: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824677}