GitLab

Makes .gni files of file lists a little cleaner.

Change-Id: I10045a56809949cdd158de067439a27dfde0125d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2424366Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809703}