Update PPDFile to PpdReference. Change the fields to a sufficient set to implement QuirksServer lo…

chromeos/printing/printer_configuration.cc

Index: chromeos/printing/printer_configuration.cc
diff --git a/chromeos/printing/printer_configuration.cc b/chromeos/printing/printer_configuration.cc
index 2eb7bf91c63d0d8c870e3aa6d99e78b62f4519bf..12d860f9beb71ccdab93978a470e2c4da868bbf2 100644
--- a/chromeos/printing/printer_configuration.cc
+++ b/chromeos/printing/printer_configuration.cc
@@ -18,8 +18,4 @@ Printer& Printer::operator=(const Printer& other) = default;
 
 Printer::~Printer() {}
 
-void Printer::SetPPD(std::unique_ptr<Printer::PPDFile> ppd) {
-  ppd_ = *(ppd.get());
-}
-
 }  // namespace chromeos