Use printer id to populate CUPS instead of printer name.

chrome/browser/chromeos/printing/printer_pref_manager.cc

Index: chrome/browser/chromeos/printing/printer_pref_manager.cc
diff --git a/chrome/browser/chromeos/printing/printer_pref_manager.cc b/chrome/browser/chromeos/printing/printer_pref_manager.cc
index 00a63f127fa198d74f351cb2b994ffd3d0bfb53e..8df6fdcfa71ace2f5cc55941f96382b14cad7613 100644
--- a/chrome/browser/chromeos/printing/printer_pref_manager.cc
+++ b/chrome/browser/chromeos/printing/printer_pref_manager.cc
@@ -100,7 +100,7 @@ void PrinterPrefManager::RegisterPrinter(std::unique_ptr<Printer> printer) {
     printer->set_id(base::GenerateGUID());
 
   std::unique_ptr<base::DictionaryValue> updated_printer =
-      printing::PrinterToPref(*(printer.get()));
+      printing::PrinterToPref(*printer);
   UpdatePrinterPref(profile_, printer->id(), std::move(updated_printer));
 }