give up on big cubics (for now) and just draw a line

BUG=683631, skia:6152

Change-Id: I69aa741af74a37e1d7bed25ad0401535599f6af0
Reviewed-on: https://skia-review.googlesource.com/7659
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2 files changed