VyprVPN App for Chrome OS including Chameleon
Currently, VyprVPN only support L2TP for Chrome OS. However, Chrome OS Store has several VPN clients, and Chrome OS also allows 'force installing' any program, including a VPN using the admin console. It's what their official page says here: https://support.google.com/chromebook/answer/1282338?hl=en
For those living in China, the Chameleon protocol would be much appreciated as it would enable us to make our chromebooks work better.