Configures which keyboard layouts are allowed for Google Chrome OS user sessions.
If this policy is set, the user can only select one of the input methods specified by this policy. If this policy is not set or set to an empty list, the user can select all supported input methods. If the current input method is not allowed by this policy, the input method will be switched to the hardware keyboard layout (if allowed) or the first valid entry in this list. All invalid or unsupported input methods in this list will be ignored.