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This CL adds an expiration internal to check whether the download can
be auto resumed.

Download later downloads are not affected.

Bug: 1090983
Change-Id: I3bc00e35af6b0e6853465f0ed4e3cc26fc957ecc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2422804Reviewed-by: Min Qin <qinmin@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809122}