Simplify the inflection/rotation finding math for stroke tessellation

Bug: skia:10419
Change-Id: I7754a1f19eea8630db3ede29e1ee7c79a53091bd
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/322041
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
1 file changed