GitLab

Store expiry date as string.

Bug: 744672
Change-Id: I83f9548ebe6a3a1e004d48476a5eed020d37b817
Reviewed-on: https://chromium-review.googlesource.com/578438
Commit-Queue: Ira Burak <iburak@google.com>
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488668}