GitLab

Make |chromeos::AccountManager| instance available from
|IdentityManager| class interface for tests.

Bug: 1068240
Change-Id: I9d66c4bddd2df105e4aa0cd42699474e99a6837b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2214383
Commit-Queue: Anastasiia N <anastasiian@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Reviewed-by: Kush Sinha <sinhak@chromium.org>
Cr-Commit-Position: refs/heads/master@{#774606}