Don't use LOD bias on OES external textures

Change-Id: Id366b644576c6e4763c0c081b6a6b40f4e930df7
Reviewed-on: https://skia-review.googlesource.com/109024
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed