This change fixes rendering on FL9_3 with shaders that reference
glPointSize and are not used with GL_POINTS rendering mode. A TDR
occurs on some hardware because of missing vertex buffers specified by
the vertex layout.

Change-Id: Ie49b75f7177c32c7f021a0409d15c27b18140c4b
Reviewed-on: https://chromium-review.googlesource.com/299719Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Cooper Partin <coopp@microsoft.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>