experimental/editor/application: pre-shape text before showing window

Also, make constructor do even less work.

Change-Id: Iced41488757d6d5d01c4e1d02eee03ab2bb109a4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/234216
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
1 file changed