Fix SkPathStroker::CheckConicLinear

Previously we were approximating a solution for this problem by treating
the down-projected points as a quad. SkConic::findMidTangent, recently
added in https://skia-review.googlesource.com/c/skia/+/341156, gives us
the actual answer. Skef Iterum originally pointed out this bug in
https://skia-review.googlesource.com/c/skia/+/301376.

Bug: skia:11074
Change-Id: Iec5ee7b79bc09cb9709d5ccc3021a17270ea3905
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/343176
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Mike Reed <reed@google.com>
1 file changed