This validation error was added in 01868135
without explanation. Shouldn't be an error according to GLES 2.0.25 spec.

Bug: 844846
Change-Id: Idc6d4d76304cbede7aa6d96bdccaefec40272b84
Reviewed-on: https://chromium-review.googlesource.com/1147149Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>