GitLab

Disable ParallelDownloadTest.ResumptionLastSliceFinished because it's
flaky on ChromeOS.

TBR=dtrainor@chromium.org, qinmin@chromium.org

Bug: 822450
Change-Id: I90d737a8397a453af90288d05c7dc6bd8eefe23f
Reviewed-on: https://chromium-review.googlesource.com/965569Reviewed-by: Min Qin <qinmin@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543742}