Currently, it gets dumped into the same file as the rest of Chrome logs.

It'd be good to have a command line flag to specify an alternative destination for it, e.g. --app-log-file=/tmp/app.log.

The default value could be '', in which case it would still be written to the Chrome log. That way, it wouldn't suddenly break functionality for existing users who want it that way.

To completely suppress app logs, you would just do: --app-log-file=/dev/null.

That's just one idea I had. Feel free to implement it a different way.