tree cbf721c4409a561327f0b54c05421d2496a2ca34
parent 8c5999637c7dcba715c93641e988ba5204caf7fa
author Kevin Cernekee <cernekee@chromium.org> 1480830962 -0800
committer chrome-bot <chrome-bot@chromium.org> 1480984990 -0800

Check the return value from DropRoot()

Unlike the other brillo::Minijail methods, this one can fail if the
username lookup does not succeed.

BUG=chromium:670985
TEST=buildbots

Change-Id: Id1d5059fb155c1a227033af0eba837ab37e96fe9
Reviewed-on: https://chromium-review.googlesource.com/416302
Commit-Ready: Kevin Cernekee <cernekee@chromium.org>
Tested-by: Kevin Cernekee <cernekee@chromium.org>
Reviewed-by: Mattias Nissler <mnissler@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>