Adding OWNERS in /content/gpu

Making sure there are at least 2 owners after I leave.
This CL was uploaded by git cl split.

R=zmo@chromium.org

Change-Id: Id375b6704e4bdfc3feafb42aa9620843ab80bbf9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1674613
Auto-Submit: Antoine Labour <piman@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672366}
1 file changed