GitLab

Make the callback function boolean, that return true to skip the
On*ChecksComplete functions.

And use |state| instead of |complete_callback| to determine the right
function to call.

Bug: 916537
Change-Id: I4ae0af25e687868d121a238c31632b89b0c0df2e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1919210Reviewed-by: Camille Lamy <clamy@chromium.org>
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Commit-Queue: Mohamed Abdelhalim <zetamoo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719119}