Simplify GrGradientEffect color handling

For analytic gradients, hoist the byte -> float, premultiplication,
and color space transformation to creation time. Eliminates second
array (only one was ever used), and four different onSetData helpers.

Bug: skia:
Change-Id: Ib5740b37ef2a5dcf2551e85b1e72f64d8cbcc5fa
Reviewed-on: https://skia-review.googlesource.com/62120
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Reviewed-by: Brian Salomon <bsalomon@google.com>
2 files changed