Mark all deleted methods private

Change-Id: I33f51efeaeabcdd7add2a88d89ecc9c1e8c054d7
Reviewed-on: https://skia-review.googlesource.com/135380
Auto-Submit: Hal Canary <halcanary@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>
Reviewed-by: Cary Clark <caryclark@google.com>
5 files changed