Added PrinterDriverInfo and PrintBackend::GetPrinterDriverInfo for windows.

printing/backend/print_backend_chromeos.cc

Index: printing/backend/print_backend_chromeos.cc
diff --git a/printing/backend/print_backend_chromeos.cc b/printing/backend/print_backend_chromeos.cc
index c61bc1d69eb735cd7a857d4a4d61c5b5de767e09..5517154fe385dc8da4d4014675f7d04eaa333db2 100644
--- a/printing/backend/print_backend_chromeos.cc
+++ b/printing/backend/print_backend_chromeos.cc
@@ -22,6 +22,9 @@ class PrintBackendChromeOS : public PrintBackend {
   virtual bool GetPrinterCapsAndDefaults(const std::string& printer_name,
                                          PrinterCapsAndDefaults* printer_info);
 
+  virtual bool GetPrinterDriverInfo(const std::string& printer_name,
+                                    PrinterDriverInfo* driver_info);
+
   virtual bool IsValidPrinter(const std::string& printer_name);
 
  private:
@@ -42,6 +45,13 @@ bool PrintBackendChromeOS::GetPrinterCapsAndDefaults(
   return false;
 }
 
+bool PrintBackendChromeOS::GetPrinterDriverInfo(
+    const std::string& printer_name,
+    PrinterDriverInfo* driver_info) {
+  NOTREACHED();
+  return false;
+}
+
 std::string PrintBackendChromeOS::GetDefaultPrinterName() {
   return std::string();
 }