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

chrome/browser/chromeos/options/passphrase_textfield.h

 // Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_OPTIONS_PASSPHRASE_TEXTFIELD_H_
 #define CHROME_BROWSER_CHROMEOS_OPTIONS_PASSPHRASE_TEXTFIELD_H_
 
 #include <string>
 
 #include "ui/views/controls/textfield/textfield.h"
 
 namespace chromeos {
 
 class PassphraseTextfield : public views::Textfield {
  public:
   PassphraseTextfield();
 
   // If show_fake is true, then the text field will show a fake password.
   void SetShowFake(bool show_fake);
 
   // Override views::Textfield so that when focus is gained, then clear out the
   // fake password if appropriate. Replace it when focus is lost if the user has
   // not typed in a new password.
-  virtual void OnFocus() override;
-  virtual void OnBlur() override;
+  void OnFocus() override;
+  void OnBlur() override;
 
   // Returns the passphrase. If it's unchanged, then returns an empty string.
   std::string GetPassphrase();
 
   bool changed() const { return changed_; }
   bool show_fake() const { return show_fake_; }
 
  private:
   void SetFakePassphrase();
   void ClearFakePassphrase();
 
   bool show_fake_;
   bool changed_;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_OPTIONS_PASSPHRASE_TEXTFIELD_H_