Add group 'chrome-usb' to security_AccountsBaseline expectations.

Fix an error in logging while I'm there.

BUG=None
TEST=security_AccountsBaseline passes again.

Change-Id: I9c78e7e6e45ad372b777c717fde37375637968b5
Reviewed-on: https://gerrit.chromium.org/gerrit/26031
Tested-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Reviewed-by: Jim Hebert <jimhebert@chromium.org>
Commit-Ready: Jorge Lucangeli Obes <jorgelo@chromium.org>
2 files changed