Draw dmsaa textures with GrFillRRectOp

With the new drawing API in Ganesh it should be relatively
straightforward to chain FPs with different textures.

Bug: skia:11396
Change-Id: I57cde39a2c00c79ea8b9b907c0ee8a034f977a14
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/386616
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
2 files changed