Update {virtual,override,final} to follow C++11 style in chrome/browser/chromeos/options.

chrome/browser/chromeos/options/cert_library.h

Index: chrome/browser/chromeos/options/cert_library.h
diff --git a/chrome/browser/chromeos/options/cert_library.h b/chrome/browser/chromeos/options/cert_library.h
index a3c898ba3db38d2fbbc63da70aa01e861b878c9b..8399dd1ee024d80caf20fefd94cd23adabb713d5 100644
--- a/chrome/browser/chromeos/options/cert_library.h
+++ b/chrome/browser/chromeos/options/cert_library.h
@@ -79,12 +79,12 @@ class CertLibrary : public CertLoader::Observer {
   int GetUserCertIndexByPkcs11Id(const std::string& pkcs11_id) const;
 
   // CertLoader::Observer
-  virtual void OnCertificatesLoaded(const net::CertificateList&,
-                                    bool initial_load) override;
+  void OnCertificatesLoaded(const net::CertificateList&,
+                            bool initial_load) override;
 
  private:
   CertLibrary();
-  virtual ~CertLibrary();
+  ~CertLibrary() override;
 
   net::X509Certificate* GetCertificateAt(CertType type, int index) const;
   const net::CertificateList& GetCertificateListForType(CertType type) const;