Reapply "SkRegion to use pathbuilder"

Fix was to reverse the sense of the ifdef around the
old API.

This reverts commit 05374bbe5377ecc581f503b04d0c5fba79a79b4c.

Change-Id: Id0f4c4372bbf1cb8d2c14c0dbca067af705ebcf1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1016998
Reviewed-by: Florin Malita <fmalita@google.com>
Reviewed-by: Daniel Dilan <danieldilan@google.com>
Commit-Queue: Mike Reed <mike@reedtribe.org>
11 files changed