Revert of stop calling SkScalarDiv (patchset #4 id:60001 of https://codereview.chromium.org/1135053002/)

Reason for revert:
need to wait for Blink roll (and patch android)

Original issue's description:
> stop calling SkScalarDiv
>
> BUG=skia:
> TBR=
>
> Committed: https://skia.googlesource.com/skia/+/67d71c898249a7af3523b16c6a69895a63bfae0a

TBR=
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1138263002
57 files changed