GrBlendFragmentProcessor::Behavior::kComposeOne uses original input.

Most callsites pass a texture effect (which ignores its input) and
nullptr and so work as is with the new interpretation of kComposeOne.
The two callsites that don't are updated to wrap their input FP in
OverrideInput(WHITE).

Bug: skia:10457
Change-Id: Idb7a0a6e9de5a25eb0c2ad1e7ade214efdba9754
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/425458
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
3 files changed