The return type of imageSize(gimageCube) is int2, not int3 BUG=angleproject:1442 Change-Id: I18bee163e7c7ce159cd23d6136486c49b7d9ec94 Reviewed-on: https://chromium-review.googlesource.com/414950 Reviewed-by: Olli Etuaho <oetuaho@nvidia.com> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>