Fix layout feedback loop in particle GUI

Bug: skia:
Change-Id: I6c5a846ed7b896d3eea27893bd946d7d0dd3f7d6
Reviewed-on: https://skia-review.googlesource.com/c/193375
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed