Standardize usage of virtual/override/final in ui/

ui/web_dialogs/web_dialog_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 UI_WEB_DIALOGS_WEB_DIALOG_UI_H_
 #define UI_WEB_DIALOGS_WEB_DIALOG_UI_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 39 matching lines @@
     int width;
     // Height of the dialog.
     int height;
     // The JSON input to pass to the dialog when showing it.
     std::string json_input;
   };
 
   // When created, the delegate should already be set as user data on the
   // WebContents.
   explicit WebDialogUI(content::WebUI* web_ui);
-  virtual ~WebDialogUI();
+  ~WebDialogUI() override;
 
   // Close the dialog, passing the specified arguments to the close handler.
   void CloseDialog(const base::ListValue* args);
 
   // Sets the delegate on the WebContents.
   static void SetDelegate(content::WebContents* web_contents,
                           WebDialogDelegate* delegate);
 
  private:
   // WebUIController
-  virtual void RenderViewCreated(
-      content::RenderViewHost* render_view_host) override;
+  void RenderViewCreated(content::RenderViewHost* render_view_host) override;
 
   // Gets the delegate for the WebContent set with SetDelegate.
   static WebDialogDelegate* GetDelegate(content::WebContents* web_contents);
 
   // JS message handler.
   void OnDialogClosed(const base::ListValue* args);
 
   DISALLOW_COPY_AND_ASSIGN(WebDialogUI);
 };
 
 // Displays external URL contents inside a modal web dialog.
 //
 // Intended to be the place to collect the settings and lockdowns
 // necessary for running external UI components securely (e.g., the
 // cloud print dialog).
 class WEB_DIALOGS_EXPORT ExternalWebDialogUI : public WebDialogUI {
  public:
   explicit ExternalWebDialogUI(content::WebUI* web_ui);
-  virtual ~ExternalWebDialogUI();
+  ~ExternalWebDialogUI() override;
 };
 
 }  // namespace ui
 
 #endif  // UI_WEB_DIALOGS_WEB_DIALOG_UI_H_