Reland "Remove flag for misc sampling apis"

This reverts commit e21c90a738c5723c713ef3a73af3aab151274058.

Reason for revert: guard landed in g3

Original change's description:
> Revert "Remove flag for misc sampling apis"
>
> This reverts commit 3f31f3027f697f3f0c0367ff09edc353a0a48f5c.
>
> Reason for revert: breaking g3
>
> Original change's description:
> > Remove flag for misc sampling apis
> >
> > Change-Id: Ia1f2d94000b6929883face241d1786de9d65e22a
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/358736
> > Reviewed-by: Mike Reed <reed@google.com>
> > Commit-Queue: Mike Reed <reed@google.com>
>
> TBR=reed@google.com
>
> Change-Id: I487b99eabbf54f680b8f4cac4343ba74cae90d31
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/359176
> Reviewed-by: Mike Reed <reed@google.com>

TBR=reed@google.com

# Not skipping CQ checks because this is a reland.

Change-Id: I867a0a40ced6a1635e27439f98e07b9050183d37
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/359241
Reviewed-by: Mike Reed <reed@google.com>
2 files changed