GitLab

There were only few minor expectations relying on verifier profile in
preferences tests. This CL removes them together with verifier profile
notion in preferences_helper.

Bug: 1137746
Change-Id: I7d74ad99feaf1dfa7c4a0eb856fcf94263a681bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2467521
Auto-Submit: Maksim Moskvitin <mmoskvitin@google.com>
Reviewed-by: Mikel Astiz <mastiz@chromium.org>
Commit-Queue: Maksim Moskvitin <mmoskvitin@google.com>
Cr-Commit-Position: refs/heads/master@{#816524}