GitLab

If two downloads have the same scheduling criteria and the same cancel
time, have the one that was created first be a better candidate to
start.

Bug: 772152
Change-Id: Ib1459a95a6703685b34d712cf5d00e188e5d5ccb
Reviewed-on: https://chromium-review.googlesource.com/703735Reviewed-by: Xing Liu <xingliu@chromium.org>
Commit-Queue: David Trainor <dtrainor@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506927}