Revert "[pathkit] Reorganize to be more like CanvasKit"

Revert submission 502817

Reason for revert: Failing tests
Reverted Changes:
I64226b571:[pathkit] Reorganize to be more like CanvasKit
Ib403708a8:[pathkit] Increase default memory size and allow g...

Change-Id: I74ebd8cde4a2b60b113574115d353576bd362310
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/503739
Auto-Submit: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
7 files changed