Fix instanced point sprites when gl_PointSize is specified but not used Change-Id: I2350fa60cae55f02d7b484c34544c035acaba6ad Reviewed-on: https://chromium-review.googlesource.com/245703 Reviewed-by: Austin Kinross <aukinros@microsoft.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>