Reduce unnecessary built-in varying usage in D3D renderer Change-Id: I0c404e77aa3f56ddc5b97a206b06c7907edfb1eb Reviewed-on: https://chromium-review.googlesource.com/259812 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>