Chrome Version: 61.0.3163.79 (Official Build) (64-bit)
OS: Linux

What steps will reproduce the problem?
(0) Connect 5 gamepads over USB or bluetooth.
(1) `ls /dev/input/js*` should show 5 devices, ranging from js0 to js4.
(2) Launch Chrome and navigate to http://html5gamepad.com. Press some buttons and determine which four gamepads are actually recognized.
(3) Disconnect one of the recognized gamepads.

What is the expected result?

The gamepad at /dev/input/js4 should be usable in some way, perhaps replacing the disconnected gamepad.

What happens instead?

Any device connected at js4 or beyond is unusable by Chrome. To fix, the user must re-enumerate gamepads so it is enumerated as js3 or below, which typically requires a reboot. (Restarting Chrome has no effect, and disconnecting/reconnecting the gamepad does not change the path.)