Reland "remove legacy 255-biased colormatrix"

This reverts commit 34d286a6d7a4522ff8d9db9e907bfcece52474ee.

Reason for revert: google3 sites updated (hopefully)

Original change's description:
> Revert "remove legacy 255-biased colormatrix"
> 
> This reverts commit ec654f73975f99443c5828f1090a5e186975a431.
> 
> Reason for revert: Seems to be breaking the Google3 roll
> 
> Original change's description:
> > remove legacy 255-biased colormatrix
> > 
> > Bug: skia:4872
> > Bug: skia:9012
> > 
> > Change-Id: I7c1ac4e94405404fcb13079b5b578a5a26aad02e
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/210628
> > Reviewed-by: Mike Reed <reed@google.com>
> > Commit-Queue: Mike Reed <reed@google.com>
> > Auto-Submit: Mike Reed <reed@google.com>
> 
> TBR=reed@google.com
> 
> Change-Id: Ib51de4f5a3f5d28b4870ca61fff43cce96e7426f
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: skia:4872, skia:9012
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211587
> Reviewed-by: Robert Phillips <robertphillips@google.com>
> Commit-Queue: Robert Phillips <robertphillips@google.com>

TBR=robertphillips@google.com,reed@google.com

Change-Id: I60e966eb05a092c2b590f819db5bacc1fe6db5db
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:4872, skia:9012
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211643
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
3 files changed