From what I understand the code which was here now is inside faye.
https://github.com/faye/faye-websocket-ruby/blob/master/lib/faye/websocket/adapter.rb#L5
https://github.com/faye/websocket-driver-ruby/blob/cdd83c4c9de252e3f2a24df6434ae60c05d35d7e/lib/websocket/driver.rb#L170