Reland "rely on clients to opt in to legacy enums"
Reland "rely on clients to opt in to legacy enums"

This reverts commit 68cbc925ecc46596105439f2f54280c5de313aea.

Reason for revert: guard added to google3

Original change's description:
> Revert "rely on clients to opt in to legacy enums"
> 
> This reverts commit 98f4e81d49dc18b0f174fa85ee697c9c364d1ab6.
> 
> Reason for revert: prolly broke google3
> 
> Original change's description:
> > rely on clients to opt in to legacy enums
> > 
> > Bug: skia:8937
> > Change-Id: I4cd9d44e87ce3309884d563c8e11336f0c39faf0
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/205934
> > Reviewed-by: Mike Reed <f5cabf8735907151a446812c9875d6c0c712d847@google.com>
> > Commit-Queue: Mike Reed <f5cabf8735907151a446812c9875d6c0c712d847@google.com>
> > Auto-Submit: Mike Reed <f5cabf8735907151a446812c9875d6c0c712d847@google.com>
> 
> TBR=f5cabf8735907151a446812c9875d6c0c712d847@google.com
> 
> Change-Id: I1a14e531b3718e27e161544dbc44d55582e1f83a
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: skia:8937
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/206064
> Reviewed-by: Mike Reed <f5cabf8735907151a446812c9875d6c0c712d847@google.com>
> Commit-Queue: Mike Reed <f5cabf8735907151a446812c9875d6c0c712d847@google.com>

TBR=f5cabf8735907151a446812c9875d6c0c712d847@google.com

Change-Id: I929fa97e05f76d50c6c3266f434c1d06803bdc30
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:8937
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/206073
Reviewed-by: Mike Reed <f5cabf8735907151a446812c9875d6c0c712d847@google.com>
Commit-Queue: Mike Reed <f5cabf8735907151a446812c9875d6c0c712d847@google.com>

google/skia,google/skia,HalCanary/skia-hc,rubenvb/skia,google/skia,rubenvb/skia,rubenvb/skia,rubenvb/skia,HalCanary/skia-hc,HalCanary/skia-hc,google/skia,aosp-mirror/platform_external_skia,rubenvb/skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,HalCanary/skia-hc,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,rubenvb/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,rubenvb/skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,rubenvb/skia,rubenvb/skia,google/skia,google/skia,HalCanary/skia-hc,rubenvb/skia,HalCanary/skia-hc,HalCanary/skia-hc