This is a reland of commit 9be2d572d4
Original change's description:
> Add anisotropic option to SkSamplingOptions.
>
> Implement on GPU.
>
> Bug: skia:13036
> Change-Id: I35d760596c4f8faaec27fccf284b70802fcf3f9b
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/524757
> Commit-Queue: Brian Salomon <bsalomon@google.com>
> Reviewed-by: Brian Osman <brianosman@google.com>
> Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Bug: skia:13036
Change-Id: I3e411aae389dc880ce32bba78852705059fb88b0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/535197
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
e6f23f98de