gm: simplify several onName

Change-Id: I9c470c2cf5d546626c279ce65626f767292a94e6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/228354
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
10 files changed