08-06-2013 08:40 AM - edited 08-06-2013 08:43 AM
Chromebooks are not suited for Second Life, they don't have the capacity or capability. They're fine for basic activities like web browsing, writing E-mails and web services. SL requires more brute force than many modern computer games, and a larger networking footprint than anything a single instance of Chrome can support.
No viewer for ChromeOS is planned, I don't think one will ever exist.
Third party viewers would be your only option. If you have the skill, you can code your own. If you have the money, you can pay for one to be made for you.