In kiosk printing mode, start printing when destination is ready.

BUG=339416

Review URL: https://codereview.chromium.org/214223002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@260041 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/print_preview/print_preview.js

@@ -884,6 +884,9 @@ cr.define('print_preview', function() {
       var selectedDest = this.destinationStore_.selectedDestination;
       setIsVisible($('cloud-print-dialog-link'),
                    !cr.isChromeOS && !selectedDest.isLocal);
+      if (this.isInKioskAutoPrintMode_) {
+        this.onPrintButtonClick_();
+      }
     },
 
     /**