This CL improves performance on the draw call microbenchmark by 10%
when no-oping driver calls.

Bug: angleproject:2738
Change-Id: I4f5c11db90d9056ce4557b2a4432bc55b42b5bba
Reviewed-on: https://chromium-review.googlesource.com/1150093
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>