Particles: SkScalar -> float

Pulling this cleanup out of a larger CL

Change-Id: Ib3ecff5d242eba72a7f2bc3ce07e09760a9ba7b7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/223181
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2 files changed