Standardize usage of virtual/override/final in chrome/browser/ui/

chrome/browser/ui/webui/app_launcher_page_ui.h

 // Copyright (c) 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_APP_LAUNCHER_PAGE_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_APP_LAUNCHER_PAGE_UI_H_
 
 #include "content/public/browser/url_data_source.h"
 #include "content/public/browser/web_ui_controller.h"
 #include "ui/base/layout.h"
 
 class Profile;
 
 namespace base {
 class RefCountedMemory;
 }
 
 // The WebUIController used for the app launcher page UI.
 class AppLauncherPageUI : public content::WebUIController {
  public:
   explicit AppLauncherPageUI(content::WebUI* web_ui);
-  virtual ~AppLauncherPageUI();
+  ~AppLauncherPageUI() override;
 
   static base::RefCountedMemory* GetFaviconResourceBytes(
       ui::ScaleFactor scale_factor);
 
  private:
   class HTMLSource : public content::URLDataSource {
    public:
     explicit HTMLSource(Profile* profile);
-    virtual ~HTMLSource();
+    ~HTMLSource() override;
 
     // content::URLDataSource implementation.
-    virtual std::string GetSource() const override;
-    virtual void StartDataRequest(
+    std::string GetSource() const override;
+    void StartDataRequest(
         const std::string& path,
         int render_process_id,
         int render_frame_id,
         const content::URLDataSource::GotDataCallback& callback) override;
-    virtual std::string GetMimeType(const std::string&) const override;
-    virtual bool ShouldReplaceExistingSource() const override;
-    virtual bool ShouldAddContentSecurityPolicy() const override;
+    std::string GetMimeType(const std::string&) const override;
+    bool ShouldReplaceExistingSource() const override;
+    bool ShouldAddContentSecurityPolicy() const override;
 
    private:
 
     // Pointer back to the original profile.
     Profile* profile_;
 
     DISALLOW_COPY_AND_ASSIGN(HTMLSource);
   };
 
   Profile* GetProfile() const;
 
   DISALLOW_COPY_AND_ASSIGN(AppLauncherPageUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_APP_LAUNCHER_PAGE_UI_H_