The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform2/+/5a30cbf06df88c851268eeac7165cb89e36b1f9d

commit 5a30cbf06df88c851268eeac7165cb89e36b1f9d
Author: Jimmy Gong <jimmyxgong@google.com>
Date: Sat Jan 19 08:14:00 2019

smbprovider: Add missing proto verifications to RemountOptionsProto

- Adds verification checks for "workgroup", "username", and "mount_config"
  in RemountOptionsProto.
- Update unit tests to reflect on this change.

BUG=chromium:922266
TEST=emerges

Change-Id: Icbea25f9fc6a51e2aa56a1442783ba58cf8e3c37
Reviewed-on: https://chromium-review.googlesource.com/1413999
Commit-Ready: jimmy gong <jimmyxgong@chromium.org>
Tested-by: jimmy gong <jimmyxgong@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Reviewed-by: Bailey Berro <baileyberro@chromium.org>

[modify] https://crrev.com/5a30cbf06df88c851268eeac7165cb89e36b1f9d/smbprovider/smbprovider_test_helper.h
[modify] https://crrev.com/5a30cbf06df88c851268eeac7165cb89e36b1f9d/smbprovider/proto_test.cc
[modify] https://crrev.com/5a30cbf06df88c851268eeac7165cb89e36b1f9d/smbprovider/smbprovider_test.cc
[modify] https://crrev.com/5a30cbf06df88c851268eeac7165cb89e36b1f9d/smbprovider/proto.cc
[modify] https://crrev.com/5a30cbf06df88c851268eeac7165cb89e36b1f9d/smbprovider/smbprovider_test_helper.cc