The tests meant to perform a draw call and validate the correctness of
the shaders.

Bug: angleproject:3580
Change-Id: I3a008d204ae3d7dceb731ba7a815ab54f38c2920
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2599938Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>