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

chrome/browser/ui/webui/chromeos/salsa_ui.h

 // Copyright 2013 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_UI_WEBUI_CHROMEOS_SALSA_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_SALSA_UI_H_
 
 #include <map>
 
 #include "base/values.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/web_ui_controller.h"
 
 namespace base {
 class ListValue;
 class Value;
 }  // namespace base
 
 // The WebUI for 'chrome://salsa' -- a user front end for the touch UI
 // blind user studies.  I does this by setting gesture preference values
 // without the user knowing which ones and having them try out various
 // settings to see which results in a better experience for them.
 class SalsaUI : public content::WebUIController {
  public:
   // Constructs a new GestureConfig for the specified |web_ui|.
   explicit SalsaUI(content::WebUI* web_ui);
-  virtual ~SalsaUI();
+  ~SalsaUI() override;
 
  private:
   // Set a preference setting's value.
   // Two parameters are provided in a JS list: prefName and value, the
   // key of the preference value to be set, and the value it's to be set to.
   void SetPreferenceValue(const base::ListValue* args);
 
   // Record the current value for a preference key and store the key/value pair
   // in the member variable orig_values_.
   void BackupPreferenceValue(const base::ListValue* args);
 
   // Check and see if a key is on the whitelist.  Returns the index into
   // the whitelist on success and -1 on failure.
   int WhitelistIndex(const char* key) const;
 
   std::map<int, const base::Value*> orig_values_;
 
   DISALLOW_COPY_AND_ASSIGN(SalsaUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_SALSA_UI_H_