Computer Configuration > Administrative Templates > Google Chrome
Both
HKLM\Software\Policies\Google\Chrome
This settings enables or disables signin interception. When this policy not set or is enabled, the signin interception dialog triggers when a Google account is added on the web, and the user may benefit from moving this account to another (new or existing) profile. When this is disabled, the signin interception dialog does not trigger. When this is disabled, a dialog will still be shown if managed account profile separation is enforced by ManagedAccountsSigninRestriction.