oopd: Run desktop rendering benchmarks with oopd turned on.

BUG=778749

Change-Id: I3ff438e53838e3e8c9c387fab837af0a31bcdac2
Reviewed-on: https://chromium-review.googlesource.com/1101643


Reviewed-by: kylechar <kylechar@chromium.org>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568127}