Update {virtual,override,final} to follow C++11 style in printing, round 2.

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 2e91fb19dfc1244a130a80b1489748be4169c8bd..e0de2305418c545b6bc4eda04047a7d88f2b58d7 100644
--- a/printing/backend/print_backend_chromeos.cc
+++ b/printing/backend/print_backend_chromeos.cc
@@ -14,20 +14,18 @@ class PrintBackendChromeOS : public PrintBackend {
   PrintBackendChromeOS();
 
   // PrintBackend implementation.
-  virtual bool EnumeratePrinters(PrinterList* printer_list) override;
-  virtual std::string GetDefaultPrinterName() override;
-  virtual bool GetPrinterSemanticCapsAndDefaults(
+  bool EnumeratePrinters(PrinterList* printer_list) override;
+  std::string GetDefaultPrinterName() override;
+  bool GetPrinterSemanticCapsAndDefaults(
       const std::string& printer_name,
       PrinterSemanticCapsAndDefaults* printer_info) override;
-  virtual bool GetPrinterCapsAndDefaults(
-      const std::string& printer_name,
-      PrinterCapsAndDefaults* printer_info) override;
-  virtual std::string GetPrinterDriverInfo(
-      const std::string& printer_name) override;
-  virtual bool IsValidPrinter(const std::string& printer_name) override;
+  bool GetPrinterCapsAndDefaults(const std::string& printer_name,
+                                 PrinterCapsAndDefaults* printer_info) override;
+  std::string GetPrinterDriverInfo(const std::string& printer_name) override;
+  bool IsValidPrinter(const std::string& printer_name) override;
 
  protected:
-  virtual ~PrintBackendChromeOS() {}
+  ~PrintBackendChromeOS() override {}
 };
 
 PrintBackendChromeOS::PrintBackendChromeOS() {}