Shift Mac 10.12 traffic onto mac minis.

With the creation of the new 'Chrome-quarantine' pool
we accidentally left the 10.12 'Chrome' pool with no
'gpu: none' machines (i.e., no VMs) to run tasks.

This CL shifts all of the tests to physical machines
where we should have capacity.

TBR=jbudorick@chromium.org
BUG=828031
NOTRY=true

Change-Id: I1624d86887e65913330bc11b0cb1b05ddc05e1f9
Reviewed-on: https://chromium-review.googlesource.com/1103846
Commit-Queue: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567921}
2 files changed