Remove modulation by input color in GrTextureEffect

Most internal users of GrTextureEffect do not want this behavior. For
situations where we do (as part of paint conversion, actual image draws,
etc...) make that modulation explicit as part of the FP tree.

Bug: skia:10139
Change-Id: Ia975e1eb063c6852ad7fba9557d7ac7122eaf53b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/303026
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
7 files changed