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

chrome/browser/google/chrome_google_url_tracker_client.h

 // Copyright 2014 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_GOOGLE_CHROME_GOOGLE_URL_TRACKER_CLIENT_H_
 #define CHROME_BROWSER_GOOGLE_CHROME_GOOGLE_URL_TRACKER_CLIENT_H_
 
 #include "components/google/core/browser/google_url_tracker_client.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class Profile;
 
 class ChromeGoogleURLTrackerClient : public GoogleURLTrackerClient,
                                      public content::NotificationObserver {
  public:
   explicit ChromeGoogleURLTrackerClient(Profile* profile);
-  virtual ~ChromeGoogleURLTrackerClient();
+  ~ChromeGoogleURLTrackerClient() override;
 
   // GoogleURLTrackerClient:
-  virtual void SetListeningForNavigationStart(bool listen) override;
-  virtual bool IsListeningForNavigationStart() override;
-  virtual bool IsBackgroundNetworkingEnabled() override;
-  virtual PrefService* GetPrefs() override;
-  virtual net::URLRequestContextGetter* GetRequestContext() override;
+  void SetListeningForNavigationStart(bool listen) override;
+  bool IsListeningForNavigationStart() override;
+  bool IsBackgroundNetworkingEnabled() override;
+  PrefService* GetPrefs() override;
+  net::URLRequestContextGetter* GetRequestContext() override;
 
  private:
   // content::NotificationObserver:
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) override;
+  void Observe(int type,
+               const content::NotificationSource& source,
+               const content::NotificationDetails& details) override;
 
   Profile* profile_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeGoogleURLTrackerClient);
 };
 
 #endif  // CHROME_BROWSER_GOOGLE_CHROME_GOOGLE_URL_TRACKER_CLIENT_H_