Remove two more gpu headers from include/*

This is probably it until GrTexture.h can be hidden.

TBR=bsalomon@google.com

Change-Id: Ie743c937f72aa0dc9f5e84def572f655f0abe041
Reviewed-on: https://skia-review.googlesource.com/14143
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
4 files changed