--mash causes hundreds of thousands of lines of UI code to behave differently, but in the best case there's no visual indication of what mode you're in.
Add an indicator to the status area that shows if you are in one of these modes.
We could add this for --mus too, but that would need to be limited based on developer builds and/or release channels, since if we roll out --mus with a Finch trial we don't want to show the indicator.
Once we build a Chrome OS "safe boot mode" this would also be a place to show that string, similar to how MS Windows does this.
Comment 1 by bugdroid1@chromium.org
, Feb 7 2018