Get semantic capabilities from Print Backend.

printing/backend/print_backend.h

Index: printing/backend/print_backend.h
===================================================================
--- printing/backend/print_backend.h	(revision 153539)
+++ printing/backend/print_backend.h	(working copy)
@@ -10,6 +10,7 @@
 #include <vector>
 
 #include "base/memory/ref_counted.h"
+#include "printing/print_job_constants.h"
 #include "printing/printing_export.h"
 
 namespace base {
@@ -32,6 +33,19 @@
 
 typedef std::vector<PrinterBasicInfo> PrinterList;
 
+struct PRINTING_EXPORT PrinterSemanticCapsAndDefaults {
+  PrinterSemanticCapsAndDefaults();
+  ~PrinterSemanticCapsAndDefaults();
+
+  // Capabilities.
+  bool color_capable;
+  bool duplex_capable;
+
+  // Current defaults.
+  bool color_default;
+  DuplexMode duplex_default;
+};
+
 struct PRINTING_EXPORT PrinterCapsAndDefaults {
   PrinterCapsAndDefaults();
   ~PrinterCapsAndDefaults();
@@ -58,6 +72,14 @@
   // Get the default printer name. Empty string if no default printer.
   virtual std::string GetDefaultPrinterName() = 0;
 
+  // Gets the semantic capabilities and defaults for a specific printer.
+  // This is usually a lighter implementation than GetPrinterCapsAndDefaults().
+  // NOTE: on some old platforms (WinXP without XPS pack)
+  // GetPrinterCapsAndDefaults() will fail, while this function will succeed.
+  virtual bool GetPrinterSemanticCapsAndDefaults(
+      const std::string& printer_name,
+      PrinterSemanticCapsAndDefaults* printer_info) = 0;
+
   // Gets the capabilities and defaults for a specific printer.
   virtual bool GetPrinterCapsAndDefaults(
       const std::string& printer_name,