Remove GrSurfaceProxy::desc()

Adds a numStencilSamples() getter.

Bug: skia:
Change-Id: I1e57f19b3cb490a6214ea436622ed8128a5a9303
Reviewed-on: https://skia-review.googlesource.com/16994
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
8 files changed