GitLab

This will add a comment to the gn_arg log link on chromium bots:
https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8930669115526655984/+/steps/lookup_GN_args/0/logs/gn_args/0

This will hopefully help avoid confusion when a non-CrOS chromium dev
gets a CL blocked by a simplechrome bot. (See the linked bug where
someone wasn't familiar with it and tried copy-pasting the arg dump
outside the SDK.)

I looked into adding the comment further upstream in chromite's
cros_chrome_sdk libs, but it makes heavy use of gn_helpers, and adding
comment support to that is non-trivial.

This can't land until https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1320309
and gets rolled into chromium.

Bug: 901471
Change-Id: I9ad646a9b6ab6fd29d4adb7acfd842b26c3825ae
Reviewed-on: https://chromium-review.googlesource.com/c/1318179Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606257}