Added PrinterDriverInfo and PrintBackend::GetPrinterDriverInfo for windows.

printing/backend/print_backend.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PRINTING_BACKEND_PRINT_BACKEND_H_
 #define PRINTING_BACKEND_PRINT_BACKEND_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 25 matching lines @@
 struct PRINTING_EXPORT PrinterCapsAndDefaults {
   PrinterCapsAndDefaults();
   ~PrinterCapsAndDefaults();
 
   std::string printer_capabilities;
   std::string caps_mime_type;
   std::string printer_defaults;
   std::string defaults_mime_type;
 };
 
+struct PRINTING_EXPORT PrinterDriverInfo {
+  PrinterDriverInfo();
+  ~PrinterDriverInfo();
+
+  std::string driver_name;
+  std::string driver_version;
+  std::string product_name;
+  std::string product_version;
+};
+
 // PrintBackend class will provide interface for different print backends
 // (Windows, CUPS) to implement. User will call CreateInstance() to
 // obtain available print backend.
 // Please note, that PrintBackend is not platform specific, but rather
 // print system specific. For example, CUPS is available on both Linux and Mac,
 // but not available on ChromeOS, etc. This design allows us to add more
 // functionality on some platforms, while reusing core (CUPS) functions.
 class PRINTING_EXPORT PrintBackend
     : public base::RefCountedThreadSafe<PrintBackend> {
  public:
   virtual ~PrintBackend();
 
   // Enumerates the list of installed local and network printers.
   virtual bool EnumeratePrinters(PrinterList* printer_list) = 0;
 
   // Get the default printer name. Empty string if no default printer.
   virtual std::string GetDefaultPrinterName() = 0;
 
   // Gets the capabilities and defaults for a specific printer.
   virtual bool GetPrinterCapsAndDefaults(
       const std::string& printer_name,
       PrinterCapsAndDefaults* printer_info) = 0;
 
+  // Gets the information about driver for a specific printer.
+  virtual bool GetPrinterDriverInfo(
+      const std::string& printer_name,
+      PrinterDriverInfo* driver_info) = 0;
+
   // Returns true if printer_name points to a valid printer.
   virtual bool IsValidPrinter(const std::string& printer_name) = 0;
 
   // Allocate a print backend. If |print_backend_settings| is NULL, default
   // settings will be used.
   // Return NULL if no print backend available.
   static scoped_refptr<PrintBackend> CreateInstance(
       const base::DictionaryValue* print_backend_settings);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_BACKEND_PRINT_BACKEND_H_