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The experimental hardware is now running Ubuntu 19.04 and NVIDIA's
418.56 driver.

Bug: 953535
Change-Id: I5a5c5644d04938d850c75bf04613229794645917
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1666442
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#671431}