Mode: force_next
Version: 55.0.2882.0
Reproduction Steps: 
1. Please see this thread: https://groups.google.com/forum/#!topic/axs-chrome-discuss/JRCkmkVqMxA
2. On Windows or Mac ChromeVox > envoke ChromeVox options
3. Tab to "use ChromeVOx Next Beta" checkbox

Observed: checking this option doesn't respond
Expected: Neta/Beta is only supported on CrOs, so this checkbox should be removed on non-CrOs