experimental/tools: minor code cleanup

Change-Id: I4d84dfed284aea9746808bf8a22f45e5bd9c519f
Reviewed-on: https://skia-review.googlesource.com/118597
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
2 files changed