SkPostConcatMatrixProvider -> SkPostTranslateMatrixProvider

The only uses of this are to do translation, so narrow the focus.

Change-Id: Ia3ccd5ce8840ad516ea12c8d8e3f8fd522e731a1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/289878
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
3 files changed