Fix SkRasterPipeline member function naming for coding style

Change-Id: Iafa1345a0daf10aca889dacc9173c77292a587f3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/774318
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
25 files changed