Revert of faster edge re-sort, drop trailing edges (patchset #4 id:60001 of https://codereview.chromium.org/891613003/)

Reason for revert:
may be breaking layouttests...

Original issue's description:
> faster edge re-sort, drop trailing edges
>
> 1. drop edges that are wholly on the right (in the non-convex walker)
> 2. scan and swap once, instead of swapping as we go during re-sort
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/38f1c00772539dcbeccbfa3c45d94bdc4acf3518

TBR=caryclark@google.com,reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/910493002
5 files changed