dEQP's resetState function triggers these assertions when testing.

BUG=angleproject:1149

Change-Id: Ib6fc3acdf15cadf3ffafad8ffda4788e34f520f0
Reviewed-on: https://chromium-review.googlesource.com/297082Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>