Replace TextureType with SkBackingFit

I believe TextureType is vestigial

Change-Id: I253f3a3200d6e05d5e0204662225f4a8e8ed5cb9
Reviewed-on: https://skia-review.googlesource.com/6029
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
3 files changed