Remove GrPaint::addColorTextureProcessor

Just make the effect and then add it.

Makes it easier to make changes to GrTextureEffect::Make going forward.

Also add default param for matrix (identity).

Change-Id: I52073f11a0a78b971bb512627198ee1724bfdac7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/263518
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
13 files changed