Add fuzzer option for Blur w/o occluder

I hypothesize that some backends look at the occluder and may have
accidentally (on purpose) been avoiding the linked bug.

Bug: skia:7956
Change-Id: If8d1de099f778b2faaa2c5ed4c562047b0dd14e7
Reviewed-on: https://skia-review.googlesource.com/131922
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
1 file changed