[print preview] Improve appearance of select control separators.

chrome/browser/resources/print_preview/print_preview_cloud.js

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('cloudprint', function() {
 
   // The URL to use to access the cloud print servers.
   // Set by a call to setBaseURL.
   var cloudPrintBaseURL = '';
 
@@ skipping 388 matching lines @@
       for (var i = 0; i < printers.length; i++) {
         if (!cloudPrinterAlreadyAdded(printers[i]['id'])) {
           if (!trackCloudPrinterAdded(printers[i]['id'])) {
             break;
           }
           var option = addDestinationListOptionAtPosition(
               lastCloudPrintOptionPos++,
               printers[i]['name'],
               printers[i]['id'],
               printers[i]['name'] == defaultOrLastUsedPrinterName,
-              false,
               false);
           cloudprint.setCloudPrint(option,
                                    printers[i]['name'],
                                    printers[i]['id']);
         }
       }
     } else {
       if (!cloudPrinterAlreadyAdded(SIGN_IN)) {
         addDestinationListOptionAtPosition(lastCloudPrintOptionPos++,
                                            localStrings.getString('signIn'),
                                            SIGN_IN,
                                            false,
-                                           false,
                                            false);
         trackCloudPrinterAdded(SIGN_IN);
         chrome.send('signIn');
       }
     }
     var selectedPrinter = printerList.selectedIndex;
     if (selectedPrinter < 0)
       return null;
     return printerList.options[selectedPrinter];
   }
 
   return {
     addCloudPrinters: addCloudPrinters,
     colorIsDefault: colorIsDefault,
     fetchPrinters: fetchPrinters,
     getBaseURL: getBaseURL,
     getData: getData,
     getPrintTicketJSON: getPrintTicketJSON,
     isCloudPrint: isCloudPrint,
     printToCloud: printToCloud,
     setBaseURL: setBaseURL,
     setCloudPrint: setCloudPrint,
     setColor: setColor,
     setDefaultPrinter: setDefaultPrinter,
     supportsColor: supportsColor,
     updatePrinterCaps: updatePrinterCaps
   };
 });