Computer Configuration > Administrative Templates > Google Chrome > Remote access
Both
HKLM\Software\Policies\Google\Chrome
Setting the policy restricts the UDP port range used by the remote access host in this machine. Leaving the policy unset or set to an empty string means the remote access host can use any available port. Note: If RemoteAccessHostFirewallTraversal is Disabled, the remote access host will use UDP ports in the 12400-12409 range. Example value: 12400-12409