This is a performance test that stresses the Error class. It also is
used in tests for the new Result class.

Bug: angleproject:2575
Change-Id: Ie23c2a1ea74108d2ba72bf26f1db04e14f7eda64
Reviewed-on: https://chromium-review.googlesource.com/1077129Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>