Make GrBackendTexture take Gr*Info refs in ctor, and copy them.

Bug: skia:
Change-Id: Ic05d3384fa07560fc18c52bb8ae03541a72515f7
Reviewed-on: https://skia-review.googlesource.com/14374
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
9 files changed