Combine the GPU and Raster morph type and direction enums, and have the
morphology base class accept the type as an argument instead of a virtual.
Adds somewhat complex deserialization code to be backwards compatible with
the old erode and dilate create procs.
Also updates SkXfermodeImageFilter's implementation to be named with the
"Impl" suffix instead of _Base, and updates both filters to have the common
code layout for image filter implementations.
Change-Id: I5082914f9754c2be71becfceb0c7d9a8fd06f569
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/231099
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
c711a86493