GitLab

In case of a non-ideal scan (user puts the same area of their finger
over and over again), the percentage goes up and we should advance
progress bar in UI to match Android's behavior.

Bug: 880105, b:112692311
Change-Id: I031eca6c2b2450f651784866ffb7ffa105a25ef1
Reviewed-on: https://chromium-review.googlesource.com/1217912Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Xiaoyin Hu <xiaoyinh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590373}