The improved cache locality improves performance by 5-10% on
command_buffer_perftests.

BUG=angleproject:2188

Change-Id: I6cce95481e2b1ce2605bce19b0a29d56718613a1
Reviewed-on: https://chromium-review.googlesource.com/1156853Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>