Standardize usage of virtual/override/final specifiers.

chrome/browser/ui/webui/gesture_config_ui.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_UI_WEBUI_GESTURE_CONFIG_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_GESTURE_CONFIG_UI_H_
 
 #include "content/public/browser/web_ui_controller.h"
 
 namespace base {
   class ListValue;
 }  // namespace base
 
 // The WebUI for 'chrome://gesture'.
 class GestureConfigUI : public content::WebUIController {
  public:
   // Constructs a new GestureConfig for the specified |web_ui|.
   explicit GestureConfigUI(content::WebUI* web_ui);
-  virtual ~GestureConfigUI();
+  ~GestureConfigUI() override;
 
  private:
   // TODO(mohsen): Add a whitelist of preferences that are allowed to be set or
   // get here and check requested preferences against this whitelist.
 
   /**
    * Request a preference setting's value.
    * This method is asynchronous; the result is provided by a call to
    * the JS method 'gesture_config.updatePreferenceValueResult'.
    */
@@ skipping 10 matching lines @@
    * 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);
 
   DISALLOW_COPY_AND_ASSIGN(GestureConfigUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_GESTURE_CONFIG_UI_H_