GitLab

Remove separate ABE success screen.
Replace success text with dedicated polymer element.

TBR: alemate@chromium.org
Bug: 811556
Change-Id: Id26aae8ec6276d57148cbb2a101094f93d28e11c
Reviewed-on: https://chromium-review.googlesource.com/c/1329630
Commit-Queue: Denis Kuznetsov <antrim@chromium.org>
Reviewed-by: Alexander Hendrich <hendrich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610496}