Revert of Refactor GrLayerHoister::FindLayersToHoist to prep for adding clip to cache...

Revert of Refactor GrLayerHoister::FindLayersToHoist to prep for adding clip to cache key (patchset #1 id:1 of https://codereview.chromium.org/640373002/)

Reason for revert:
Failing unit tests

Original issue's description:
> Refactor GrLayerHoister::FindLayersToHoist to prep for adding clip to cache key
>
> NOTRY=true
>
> Committed: https://skia.googlesource.com/skia/+/27415b71bd529456165945e19b5b7efbebf6fb51

TBR=jvanverth@google.com
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/644823003