Use bitwise operations instead of division, which is expensive on multiple CPU architectures. BUG=angleproject:956 TEST=angle_end2end_tests Change-Id: I57ab540d447c03dae5a96bafb4975fc37e310261 Reviewed-on: https://chromium-review.googlesource.com/262181Tested-by: Olli Etuaho <oetuaho@nvidia.com> Reviewed-by: Nicolas Capens <capn@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>
