chrome background silent printing app with or without cloud print (repost)

we curretly have a web based pos application that allows users to click one button (and using active x controls in IE) prints a pdf or html doc in the background silently. we would like to move all our users over to chrome (for speed) but we still need to have documents automatically print in the background when a order is entered to local networked printers. if you can solve this problem for us in chrome let us know. If it can work with google cloud printing, we would be open to that also. thanks