[gIRA] Return an empty list when off the record.

Bug: 1045506
Change-Id: I3e8b192331c848241848e754ffde0309b620efcc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2022669
Commit-Queue: Rayan Kanso <rayankans@chromium.org>
Commit-Queue: Peter Beverloo <peter@chromium.org>
Auto-Submit: Rayan Kanso <rayankans@chromium.org>
Reviewed-by: Peter Beverloo <peter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735432}