Try a different calculation for computing convexity.

Change-Id: I3b4a6a95ec9f890b35948d745dd02a2b05a8d7cb
Reviewed-on: https://skia-review.googlesource.com/10116
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
1 file changed