GitLab

Before PreferenceWatcher was not created when Drive was disabled by the
kDisableDrive pref, which would cause Drive to not start when the pref
was changed.

Bug: 1110238
Change-Id: Ic96c757ed77a8cb957dc6959f7ea40efb5460b9f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2328544
Commit-Queue: Austin Tankiang <austinct@chromium.org>
Reviewed-by: Sergei Datsenko <dats@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832218}