Revert "Switch cros_download_vm DEPS hook to use gclient tuple support."

This reverts commit 4a0113c6f14d1336195202edd9d0b8b875128a5e.

Reason for revert: needs a downstream recipe roll.

Original change's description:
> Switch cros_download_vm DEPS hook to use gclient tuple support.
> 
> Slightly cleaner this way.
> 
> Bug: 947531
> Change-Id: I9dcc66d92562ddae8adcbf58b7e0bf9a2ffdc481
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1625812
> Reviewed-by: John Budorick <jbudorick@chromium.org>
> Commit-Queue: Ben Pastene <bpastene@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#663149}

TBR=dpranke@chromium.org,bpastene@chromium.org,jbudorick@chromium.org

Change-Id: I4970238858b649f884e3f6afecc8a008be25f2d5
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 947531
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1628479
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#663171}
1 file changed