Take PPD and CUPS defaults into account on Mac.

printing/backend/cups_helper.cc

Index: printing/backend/cups_helper.cc
diff --git a/printing/backend/cups_helper.cc b/printing/backend/cups_helper.cc
index 80019f090193adbf867e62d599912a81db7f15fb..c0271b2a2872f46b9eeb74b73f9b555a6a86aa89 100644
--- a/printing/backend/cups_helper.cc
+++ b/printing/backend/cups_helper.cc
@@ -38,7 +38,6 @@ const char kPageSize[] = "PageSize";
 
 const double kMicronsPerPoint = 10.0f * kHundrethsMMPerInch / kPointsPerInch;
 
-#if !defined(OS_MACOSX)
 void ParseLpOptions(const base::FilePath& filepath,
                     const std::string& printer_name,
                     int* num_options, cups_option_t** options) {
@@ -98,7 +97,6 @@ void ParseLpOptions(const base::FilePath& filepath,
 void MarkLpOptions(const std::string& printer_name, ppd_file_t** ppd) {
   cups_option_t* options = NULL;
   int num_options = 0;
-  ppdMarkDefaults(*ppd);
 
   const char kSystemLpOptionPath[] = "/etc/cups/lpoptions";
   const char kUserLpOptionPath[] = ".cups/lpoptions";
@@ -120,7 +118,6 @@ void MarkLpOptions(const std::string& printer_name, ppd_file_t** ppd) {
     }
   }
 }
-#endif  // !defined(OS_MACOSX)
 
 bool GetBasicColorModelSettings(ppd_file_t* ppd,
                                 ColorModel* color_model_for_black,
@@ -369,11 +366,10 @@ bool ParsePpdCapabilities(
                << line << ", " << ppdErrorString(ppd_status);
     return false;
   }
+  ppdMarkDefaults(ppd);
+  MarkLpOptions(printer_name, &ppd);
 
   printing::PrinterSemanticCapsAndDefaults caps;
-#if !defined(OS_MACOSX)
-  MarkLpOptions(printer_name, &ppd);
-#endif
   caps.collate_capable = true;
   caps.collate_default = true;
   caps.copies_capable = true;