BUG=angleproject:1595
TEST=dEQP-GLES31.functional.draw_indirect.*

Change-Id: I82f5d0864e70d6e7abdccf5f10330ddfa099ec62
Reviewed-on: https://chromium-review.googlesource.com/417250
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>