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This CL includes version info (e.g. version, channel, OS, CL, etc) in
the JSON download and copy exports. This was already included in batch
exports.

Bug: 891303, 987279
Change-Id: Ic1b04046320b366b56b7629edbe65892d4fc3c70
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2432045Reviewed-by: Orin Jaworski <orinj@chromium.org>
Commit-Queue: manuk hovanesian <manukh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810781}