Revert "use pathbuilder"

This reverts commit 4b25d41d96b344545161baf0e26c78d2b3742b00.

Reason for revert: grrrr, broke some layout test (a little)

https://test-results.appspot.com/data/layout_results/linux-blink-rel/40609/blink_web_tests%20%28with%20patch%29/layout-test-results/results.html

Original change's description:
> use pathbuilder
> 
> Change-Id: I4b7cd6aed0c8da44e6065bb171332e25988ec8cc
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/313376
> Reviewed-by: Mike Reed <reed@google.com>
> Commit-Queue: Mike Reed <reed@google.com>

TBR=reed@google.com

Change-Id: I7a073aafcfddc398ab9a761719230f2427c987c6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/313420
Reviewed-by: Mike Reed <reed@google.com>
25 files changed