GitLab

Implement autocomplete, shared-with-me and available-offline queries
based on the API provided by the DriveFS system service.

BUG=chromium:854481

Change-Id: I0645bc57754fb7ad1663777647d1ff9ad21e79c4
Reviewed-on: https://chromium-review.googlesource.com/1235458
Commit-Queue: Sergei Datsenko <dats@chromium.org>
Reviewed-by: Sam McNally <sammc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593482}