Replace most uses of GrSurface::desc() with conifg(), width(), etc.

Change-Id: Ic283c0ddf9efa0a467e97e10f5413ba9dfcb414f
Reviewed-on: https://skia-review.googlesource.com/17211
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
5 files changed