NACL Does it work on chromebooks?

We were wondering if it is possible to export a unity project to run on chromebooks.
I have been googling about but could not find anything up to date regarding this.

In here
http://docs.unity3d.com/Documentation/Manual/nacl-gettingstarted.html

It mentions that “Chrome-OS” is being worked on, but if it runs in a browser than does it matter?
Also what kind of architecture is supported etc?

The NaCl support has been discontinued. However, Unity 4.2 can export a NaCl build. This will work on Intel-based Chromebooks. There is no support for Arm-based devices.