The most basic perf test possible.

BUG=angleproject:xxxx

Change-Id: I71b28098c0a1f2174a0177b08bddf74d337438e9
Reviewed-on: https://chromium-review.googlesource.com/427270Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>