Remove Sk4fGradientInterval::fZeroRamp





It's cheap enough to compute when needed, and we don't need it in hot
loops anyway.
Change-Id: Ib0242f98f8bee31bff939cfdc7356d51525092e4
Reviewed-on: https://skia-review.googlesource.com/15764
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Herb Derby <herb@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
3 files changed