GitLab

Make label initialization more consistent and less verbose by pulling
common init into a local lambda. This should have no behavioral effect
except for giving the timestamp labels the same color as the other
labels.

Bug: none
Change-Id: I1fea98a91e979d1dc5ebb6e3a3976e092f7673f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1568085Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652262}