Just skip uninstantiated GrOps instead of delete them on flush.

Change-Id: I4e1755872979b635ad993cfba6b17d7b79ee2c54
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/238179
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
3 files changed