Remove GrBlurredEdgeFragmentProcessor, use GrRuntimeFPBuilder

Change-Id: Ia5d849a2ab3fc233c4feacb5198a0684978ca3a9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/410794
Reviewed-by: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
7 files changed