As a parent of a kid with ADHD and a Chromebook, I'm appalled at how wide open access to everything on the Internet is on Chromebooks. Trying to keep him on track when there's the constant temptation and ability to alt-tab over to YouTube means my wife and I have to be ever vigilant that he's actually working.
No, his ADHD isn't Google's fault, but they're designing and deploying tools for lots of kids who have impulse control issues.