If the GL_OES_texture_npot extension isn't active, then setting
GL_TEXTURE_WRAP_S/T to GL_REPEAT for a NPOT texture results in black
rendering. This is specified in Section 3.8.2 of the OpenGL ES 2.0
specification.

Setting GL_TEXTURE_WRAP_S/T to GL_CLAMP_TO_EDGE is valid even if the
NPOT extension isn't active.

Change-Id: Ibd553620995df32138bf8153d1036fd05d386d90
Reviewed-on: https://chromium-review.googlesource.com/306302Tested-by: Austin Kinross <aukinros@microsoft.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>