identify interesting cubic points

Bug: skia:
Change-Id: Ib649fe2c487c4f0183c2e7e5f5aadd7381a865ba
Reviewed-on: https://skia-review.googlesource.com/117623
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed