These convert a color between the working color space and a known,
useful space (linear TF, sRGB gamut).
Bug: skia:10479
Change-Id: I3308e691beeaca5120ed0c2e30cf08661caa3684
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/481416
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>