Revert "In SkImageBlurFilter, use ScaledDividerU32"

This reverts commit 8021f21b132ce5b90ed1d885311ec7f936466ede.

Reason for revert: Missing change

Original change's description:
> In SkImageBlurFilter, use ScaledDividerU32
>
> Bug: skia:12522
>
> Change-Id: I6608e66b44710f3633635d3621bdae2a5523f28b
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/458456
> Reviewed-by: Brian Osman <brianosman@google.com>
> Commit-Queue: Herb Derby <herb@google.com>

Bug: skia:12522
Change-Id: I5c677ce435c9964be648acbda17d694c12894b3b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/458719
Auto-Submit: Herb Derby <herb@google.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
1 file changed