Add a host on the Chrome side to mount and communicate with DriveFS.

Bug: 823607
Change-Id: I763d48015011dc4cb59d1e5d15cc78b9cf13f2b7
Reviewed-on: https://chromium-review.googlesource.com/1032271
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Sam McNally <sammc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556364}
15 files changed