GitLab

Use new MaybeSkip method for skipping screen. Add tests for UMA stats.

Bug: 1064561, 1095062
Change-Id: I9ba91dd8b132367a160b975f724b5e1692987832
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2166263Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Commit-Queue: Roman Aleksandrov <raleksandrov@google.com>
Cr-Commit-Position: refs/heads/master@{#793103}