Remove an assumption that fOpsTask != nullptr

TBR=rmistry@google.com

Bug: skia:
Change-Id: Ic66a63af10b56b1c322309f0e5945b9b4ec1a9f3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/245531
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
1 file changed