fix MakeFromImage examples

deprecated flavor, erroneously used, have been removed

Docs-Preview: https://skia.org/?cl=115581
Bug: skia:6898
Change-Id: Idc47411831985d4504ce1b230cb02731ec8a2edb
Reviewed-on: https://skia-review.googlesource.com/115581
Commit-Queue: Cary Clark <caryclark@skia.org>
Reviewed-by: Cary Clark <caryclark@skia.org>
3 files changed