Add unit test for password controller helper.

Bug: 865114
Change-Id: I74a77252b7280f2e85df56f3ce7f4a0fd28b9873
Reviewed-on: https://chromium-review.googlesource.com/1169028
Commit-Queue: Scott Wu <scottwu@chromium.org>
Reviewed-by: John Wu <jzw@chromium.org>
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Reviewed-by: Hiroshi Ichikawa <ichikawa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586244}
3 files changed