Add new PolyUtils benches

Bug: skia:
Change-Id: I62f02a122b431e6c9a866e80c441f3e18b1e69fb
Reviewed-on: https://skia-review.googlesource.com/155842
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
1 file changed