start cleaning up non-skcms SkColorSpaceXforms

I think this gets rid of
  - SkColorSpaceXform_Base
  - SkColorSpaceXform_XYZ
  - SkColorSpaceXform_A2B
and lots of support code.  Might be more left to clean up?

Change-Id: I560d974d1e879dfd6a63ee2244a3dd88bd495c8a
Reviewed-on: https://skia-review.googlesource.com/129512
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Mike Klein <mtklein@chromium.org>
Reviewed-by: Brian Osman <brianosman@google.com>
18 files changed