remove bicubic clamp in SkImageShader

We ought to be able to handle out-of-gamut colors now, whatever
their provenance.  Should be we can just not clamp here.

Bug: skia:5733

Change-Id: Icd9851543638fd81755afee2eac2347702b88e9f
Reviewed-on: https://skia-review.googlesource.com/87000
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Brian Osman <brianosman@google.com>
2 files changed