GitLab

Changes the fingeprint enrollment dialog on the security keys settings
subpage to iron-announce upon successful completion of a fingerprint
enrollment.

Bug: 974046
Change-Id: I61e4fc17d55bd16d2de299084586ec078829acc7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1898433Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Martin Kreichgauer <martinkr@google.com>
Cr-Commit-Position: refs/heads/master@{#712639}