PrintPreview: Added code to identify the printer default duplex value.

chrome/browser/printing/print_dialog_gtk.cc

Index: chrome/browser/printing/print_dialog_gtk.cc
diff --git a/chrome/browser/printing/print_dialog_gtk.cc b/chrome/browser/printing/print_dialog_gtk.cc
index 3e803edff28f33be2afe1720e1c4c24da6e4342e..c3ffc903232b709c993fe0e3cdba4dd3f2421f7e 100644
--- a/chrome/browser/printing/print_dialog_gtk.cc
+++ b/chrome/browser/printing/print_dialog_gtk.cc
@@ -161,19 +161,23 @@ bool PrintDialogGtk::UpdateSettings(const DictionaryValue& settings,
   bool landscape;
   bool print_to_pdf;
   int copies;
-  int duplex_mode;
+  DictionaryValue* duplex_info;
+  int user_selected_duplex_value;
   std::string device_name;
 
   if (!settings.GetBoolean(printing::kSettingLandscape, &landscape) ||
       !settings.GetBoolean(printing::kSettingCollate, &collate) ||
       !settings.GetBoolean(printing::kSettingColor, &color) ||
       !settings.GetBoolean(printing::kSettingPrintToPDF, &print_to_pdf) ||
-      !settings.GetInteger(printing::kSettingDuplexMode, &duplex_mode) ||
+      !settings.GetDictionary(printing::kSettingDuplexModeInfo, &duplex_info) ||
       !settings.GetInteger(printing::kSettingCopies, &copies) ||
-      !settings.GetString(printing::kSettingDeviceName, &device_name)) {
+      !settings.GetString(printing::kSettingDeviceName, &device_name) ||
+      !duplex_info->GetInteger(printing::kUserSelectedDuplexValue,
+                               &user_selected_duplex_value)) {
     return false;
   }
 
+
   if (!print_to_pdf) {
     scoped_ptr<GtkPrinterList> printer_list(new GtkPrinterList);
     printer_ = printer_list->GetPrinterWithName(device_name.c_str());
@@ -187,7 +191,7 @@ bool PrintDialogGtk::UpdateSettings(const DictionaryValue& settings,
     gtk_print_settings_set(gtk_settings_, kCUPSColorModel,
                            color ? kColor : kGrayscale);
     const char* cups_duplex_mode;
-    switch (duplex_mode) {
+    switch (user_selected_duplex_value) {
       case printing::LONG_EDGE:
         cups_duplex_mode = kDuplexNoTumble;
         break;