GitLab

Move some code around for easier re-use.

Moves CertBuilder higher in the file so it can be used in a follow-up change.

Change-Id: Ic51018282de2deb851d08bfdc9246850babdb73c
Reviewed-on: https://chromium-review.googlesource.com/1161108Reviewed-by: Matt Mueller <mattm@chromium.org>
Commit-Queue: Eric Roman <eroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#580334}