Load system salt in SanitizeUserName.

External callers of SanitizeUserName shouldn't have to worry about lazy
system salt loading, so make an attempt to load the salt in
SanitizeUserName().

BUG=None
TEST=Compiles and passes tests.

Change-Id: I0a752592a6e8ee5db70800bb8df4262e3739d7f4
Reviewed-on: https://gerrit.chromium.org/gerrit/37013
Reviewed-by: Bartosz Fabianowski <bartfab@chromium.org>
Reviewed-by: Elly Jones <ellyjones@chromium.org>
Commit-Ready: Mattias Nissler <mnissler@chromium.org>
Tested-by: Mattias Nissler <mnissler@chromium.org>
1 file changed