tools/sk_app/macos: support command key

Change-Id: Ie04918f2bfc296eedbba67d96f62ee37e0303061
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/231136
Commit-Queue: Hal Canary <halcanary@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
1 file changed