GitLab

This allows CrostiniManager to handle states where a VM hasn't finished
starting/stopping fully.

BUG=880165

Change-Id: Ia94bf4059c4bfbf41c3fe920873fa7c8bc2aea18
Reviewed-on: https://chromium-review.googlesource.com/1212206Reviewed-by: Nicholas Verne <nverne@chromium.org>
Commit-Queue: Josh Pratt <jopra@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589449}