This can be tested more fully once parsing arrays of arrays will be
supported.

BUG=angleproject:2125

Change-Id: I89c8f33b8cca5d6f5aa3f20aab23dccac53a956f
Reviewed-on: https://chromium-review.googlesource.com/733128Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>