GM: s/handleKey/onChar/

Change-Id: I917de2705807f61e6a6c3f76d52e290e8194d204
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/225936
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
7 files changed