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

chrome/browser/favicon/chrome_favicon_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_FAVICON_CHROME_FAVICON_CLIENT_H_
 #define CHROME_BROWSER_FAVICON_CHROME_FAVICON_CLIENT_H_
 
 #include "components/favicon/core/browser/favicon_client.h"
 
 #include "base/macros.h"
 
 class FaviconService;
 class GURL;
 class Profile;
 
 // ChromeFaviconClient implements the the FaviconClient interface.
 class ChromeFaviconClient : public FaviconClient {
  public:
   explicit ChromeFaviconClient(Profile* profile);
-  virtual ~ChromeFaviconClient();
+  ~ChromeFaviconClient() override;
 
   // FaviconClient implementation:
-  virtual FaviconService* GetFaviconService() override;
-  virtual bool IsBookmarked(const GURL& url) override;
+  FaviconService* GetFaviconService() override;
+  bool IsBookmarked(const GURL& url) override;
 
  private:
   Profile* profile_;
   DISALLOW_COPY_AND_ASSIGN(ChromeFaviconClient);
 };
 
 #endif  // CHROME_BROWSER_FAVICON_CHROME_FAVICON_CLIENT_H_