Add early out validation in drawArraysCommon Bug: angleproject:6791 Change-Id: I60de6806dae9c917c6db24a18f586e3b0aa2154e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3331414 Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Gregg Tavares <gman@chromium.org>