GitLab

The builder has 20 hour hourly resource usage in p99.
http://shortn/_Guag8HYefG

So I expect this won't add much burden to existing xenial pool.
Current usage is in
https://datastudio.google.com/s/uf5Kh6NZ8XA
And we have 3400 xenial bots in MTV time now.

Test on Xenial seems generally slow, so I need to mark some tests as timeout.
https://ci.chromium.org/p/chromium/builders/ci/WebKit%20Linux%20MSAN/1075
https://ci.chromium.org/p/chromium/builders/try/linux-webkit-msan-rel/38

Total runtime: 17:00:52 (trusty) vs 19:37:25 (xenial).

Bug: 954450, 856601
Change-Id: I6ad7e33cb678e33918614c21e58dc916d6dc3e1d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1728912Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683261}