GitLab

Just cleaning up some bio enrollment-related code and reducing copying.

Bug: 974046
Change-Id: If0f30989ee06097717abd0f62887ed7ba00d4ec4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1659851
Commit-Queue: Matthew Webb <noviv@google.com>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Reviewed-by: Kim Paulhamus <kpaulhamus@chromium.org>
Cr-Commit-Position: refs/heads/master@{#669935}