The Chromium style output will allow the perf bots to collect data
from our performance tests.

BUG=angle:744

Change-Id: I2ffdace688004edf2918ead2a3e2aa2a6c4daf95
Reviewed-on: https://chromium-review.googlesource.com/220361Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>