Use more of pathbuilder

Bug: skia:9000
Change-Id: Ia5c16ffbaeebbdd027c692c96095cfa181030d35
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/307702
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
9 files changed