Add floor/ceil stages to Raster Pipeline.

Change-Id: I2ca988f7b59ca7f7873cd43e319e69d4cde70aa3
Bug: skia:13676
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/626203
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
3 files changed