tree b23074234e7a127be7e51c3338a94df648e44d97
parent d61eadd9a1815ee3b441ee51d1da73256e108f9e
author Julien Desprez <jdesprez@google.com> 1538520454 -0700
committer Julien Desprez <jdesprez@google.com> 1538520586 -0700

Auto create null-device for fake device placeholder

Avoid the host having to have null-device specified just
create them on the fly.

Test: unit tests
http://sponge.corp.google.com/invocation?tab=Test+Cases&show=FAILED&show=INTERNAL_ERROR&id=6e547052-1c1b-4cec-9c28-f6e36051b460
Bug: 110416235

Change-Id: I370b15fb936d6a2cd428d9f9300cdd9e447be719