Revert "Remove GrSurfaceDesc member from GrSurface."

Revert "Remove GrSurfaceDesc member from GrSurface."

This reverts commit 84911546b9535a2fff6c5e07f588f175d5a04f45.

Reason for revert: Breaking bots possibly?

Original change's description:
> Remove GrSurfaceDesc member from GrSurface.
>
> Change-Id: I0fe979994e1e3fc457b952dfb5e0090c45fad771
> Reviewed-on: https://skia-review.googlesource.com/17273
> Commit-Queue: Brian Salomon <bsalomon@google.com>
> Reviewed-by: Robert Phillips <robertphillips@google.com>
>

TBR=bsalomon@google.com,robertphillips@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I404e509fcd3e3d5527b3bc6e286b7d436c12e879
Reviewed-on: https://skia-review.googlesource.com/17364
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>