GitLab

The function FindUserBySID was not returning a successful result
when it is passed no username or domain to fill even though the
user was found.

Bug: 933850
Change-Id: I97c9e208ea85695b94651029aac4c58b551beaa6
Reviewed-on: https://chromium-review.googlesource.com/c/1479091
Auto-Submit: Tien Mai <tienmai@chromium.org>
Commit-Queue: Roger Tawa <rogerta@chromium.org>
Reviewed-by: Roger Tawa <rogerta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#633834}