GitLab

This CL reverts r397982 ( https://codereview.chromium.org/2032613004 )
and also flips the main win CQ bots back to GYP. This will hopefully
get the cycle time and capacity issues for the CQ back under control.

TBR=brucedawson@chromium.org, phajdan.jr@chromium.org
BUG=617837

Review-Url: https://codereview.chromium.org/2035413004
Cr-Commit-Position: refs/heads/master@{#398210}