Minor optimizations to texture functions. By shuffling some parameters and calls around we can reduce the number of function calls we run for texture operations. Change-Id: If6d14cb6dff668cdfcb2f1fe6705e0d488dbc03f Reviewed-on: https://chromium-review.googlesource.com/183582 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Shannon Woods <shannonwoods@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>