Fix precision in AARectEffect

The rect should be 4 floats, not halfs. Also simplifies the non-aa FP.

Bug: skia:7190
Change-Id: If0993a7a26b84bd9a4e644b8e8a37bf8ce86916a
Reviewed-on: https://skia-review.googlesource.com/69800
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
1 file changed