Reland "Replace some gradient .fps with runtime FPs"

This reverts commit 16c0791a5a84186e604f6af5407cac63a7f44bbb.

Reason for revert: Only errors are AMD+ANGLE+D3D9+ES2

Original change's description:
> Revert "Replace some gradient .fps with runtime FPs"
>
> This reverts commit 68d6983acd82735a8a5d58d72285fc0319452e0a.
>
> Reason for revert: Going to investigate some bad ANGLE_D3D_ES2 images.
>
> Original change's description:
> > Replace some gradient .fps with runtime FPs
> >
> > Change-Id: Ia00f88d00c6010d87c775acd32493673020d5ae8
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/420577
> > Commit-Queue: Brian Osman <brianosman@google.com>
> > Reviewed-by: Michael Ludwig <michaelludwig@google.com>
>
> TBR=bsalomon@google.com,brianosman@google.com,michaelludwig@google.com
>
> Change-Id: If57772f0e2d5236c5122f3c7fe261c0a59f3b141
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/421920
> Reviewed-by: Brian Osman <brianosman@google.com>
> Commit-Queue: Brian Osman <brianosman@google.com>

# Not skipping CQ checks because this is a reland.

Change-Id: I3903a23ab08c256303ee14814f16b4d2e1cbc642
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/421928
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
24 files changed