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

chrome/browser/browsing_data/browsing_data_cookie_helper.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_BROWSING_DATA_BROWSING_DATA_COOKIE_HELPER_H_
 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_COOKIE_HELPER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 108 matching lines @@
                         const std::string& cookie_line,
                         const net::CookieOptions& options);
 
   // Clears the list of canned cookies.
   void Reset();
 
   // True if no cookie are currently stored.
   bool empty() const;
 
   // BrowsingDataCookieHelper methods.
-  virtual void StartFetching(
+  void StartFetching(
       const net::CookieMonster::GetCookieListCallback& callback) override;
-  virtual void DeleteCookie(const net::CanonicalCookie& cookie) override;
+  void DeleteCookie(const net::CanonicalCookie& cookie) override;
 
   // Returns the number of stored cookies.
   size_t GetCookieCount() const;
 
   // Returns the map that contains the cookie lists for all frame urls.
   const OriginCookieSetMap& origin_cookie_set_map() {
     return origin_cookie_set_map_;
   }
 
  private:
   // Check if the cookie set contains a cookie with the same name,
   // domain, and path as the newly created cookie. Delete the old cookie
   // if does.
   bool DeleteMatchingCookie(const net::CanonicalCookie& add_cookie,
                             canonical_cookie::CookieHashSet* cookie_set);
 
-  virtual ~CannedBrowsingDataCookieHelper();
+  ~CannedBrowsingDataCookieHelper() override;
 
   // Returns the |CookieSet| for the given |origin|.
   canonical_cookie::CookieHashSet* GetCookiesFor(const GURL& origin);
 
   // Adds the |cookie| to the cookie set for the given |frame_url|.
   void AddCookie(const GURL& frame_url,
                  const net::CanonicalCookie& cookie);
 
   // Map that contains the cookie sets for all frame origins.
   OriginCookieSetMap origin_cookie_set_map_;
 
   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataCookieHelper);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_COOKIE_HELPER_H_