SkQP:  debug option, and fix a bug

Change-Id: I642c65815fdab5adcd7735956e1955ede8ff229a
Reviewed-on: https://skia-review.googlesource.com/106805
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
(cherry picked from commit c126191fd1f540f7318516a965c85a5bff07dad1)
Reviewed-on: https://skia-review.googlesource.com/106960
Reviewed-by: Hal Canary <halcanary@google.com>
2 files changed