GitLab

Add a progress bar style (linear) activity indicator to be shown at the
top of the dialog during certain steps of the WebAuthn UI flow.

Bug: 849323
Change-Id: Ib7faa0528a2914d61ad8bed1e935fe9b083307c3
Reviewed-on: https://chromium-review.googlesource.com/1181906Reviewed-by: Jun Choi <hongjunchoi@chromium.org>
Commit-Queue: Balazs Engedy <engedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584716}