Fix timezone issues on UsageTimeLimitProcessor.

Bug: 823536, 860679
Change-Id: I79cd88766e92f9f2243d7ce9a4de8545d0932014
Reviewed-on: https://chromium-review.googlesource.com/1124499
Commit-Queue: Henrique Grandinetti <hgrandinetti@google.com>
Reviewed-by: Alexander Alekseev <alemate@chromium.org>
Reviewed-by: Jacob Dufault <jdufault@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576591}
5 files changed