Fixes to skpbench to actually clean itself up nicely.

Bug: skia:9724
Change-Id: Ib6745042e7fbf529fda9d903b3eb1044f4eb4ee0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/260399
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
1 file changed