Fix Mac viewer on command line launch.

If you launch the Mac viewer from the command line, it will sit there
until you click on the thumbnail in the dock, and only then will bring
up the window. This fixes that so it will open the window immediately.

Change-Id: I5628dc6c59833f808a61dedde457774114dd0e94
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/222783
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed