GitLab

Splits downloadEntry into UkmInfo and InProgressInfo,
added new information needed to resume the download item after chrome crashes.


Bug: 803135
Change-Id: Ided64d9801a3e8e1d8390a4190d17aa3b58d652c
Reviewed-on: https://chromium-review.googlesource.com/1036539
Commit-Queue: Min Qin <qinmin@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556179}