enter_chroot: Fix chrome_root being silently ignored if it was invalid.

BUG=chromium:1171574
TEST=Confirmed that it works correctly with no argument, valid argument,
and invalid arguments.

Change-Id: I403bc07bf1e1dab3df4f0dd8d03e20d2b4e3777d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2653446
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Matt Stark <msta@google.com>
Commit-Queue: Matt Stark <msta@google.com>
Tested-by: Matt Stark <msta@google.com>
Auto-Submit: Matt Stark <msta@google.com>
1 file changed