GitLab

Clean up the enrollment handler, refactor sequence_checker, and use
BindOnce for EnrollTemplate.

Bug: 974046
Change-Id: I06ddd3caba96f335012cc6cd1c6aa250045b6ed0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1678787
Auto-Submit: Matthew Webb <noviv@google.com>
Reviewed-by: Kim Paulhamus <kpaulhamus@chromium.org>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Commit-Queue: Matthew Webb <noviv@google.com>
Cr-Commit-Position: refs/heads/master@{#672615}