simplify confusing examples

Docs-Preview: https://skia.org/?cl=135785
Bug: skia:6898
Change-Id: Idf5e44817a86accaa628ea5d7abb47cd2b06d048
Reviewed-on: https://skia-review.googlesource.com/135785
Commit-Queue: Cary Clark <caryclark@skia.org>
Auto-Submit: Cary Clark <caryclark@skia.org>
Reviewed-by: Cary Clark <caryclark@skia.org>
5 files changed