Change dEQP ES 3.1 expectations from FAIL to SKIP. UNIMPLEMENTED debug spam was causing the tests time time out. We can mark them as FAIL again once the dEQP test setup/tear down code doesn't emmit so many messages. Implement a couple validation cases for ES 3.1 to greatly reduce the spam. BUG=angleproject:1647 BUG=angleproject:1442 Change-Id: Ie7b4ac8737a2df1c0ada6ad53154ddf2f37d9c3c Reviewed-on: https://chromium-review.googlesource.com/415520 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>