Computer Configuration > Administrative Templates > Google Chrome > Printing
Both
HKLM\Software\Policies\Google\Chrome
Setting the policy to Enabled or leaving it unset lets Google Chrome act as a proxy between Google Cloud Print and legacy printers connected to the machine. Using their Google Account, users may turn on the cloud print proxy by authentication. Setting the policy to Disabled means users can't turn on the proxy, and the machine can't share its printers with Google Cloud Print.