Fixed a typo in generatePointSpriteHLSL. Change-Id: I104bbca6442835ab5e8e78580c6cbbb58d32a9b2 Reviewed-on: https://chromium-review.googlesource.com/227570 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>