Revert of Test that GrFragmentProcessors work without input colors. (patchset #2...

Revert of Test that GrFragmentProcessors work without input colors. (patchset #2 id:20001 of https://codereview.chromium.org/1341853002/ )

Reason for revert:
Need to fix up more processor subclasses.

Original issue's description:
> Test that GrFragmentProcessors work without input colors.
>
> Committed: https://skia.googlesource.com/skia/+/72c58e7052af2a0855412ce4b249f977069db751

TBR=joshualitt@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1338403003