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

chrome/browser/font_family_cache.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_FONT_FAMILY_CACHE_H_
 #define CHROME_BROWSER_FONT_FAMILY_CACHE_H_
 
 #include "base/containers/hash_tables.h"
 #include "base/gtest_prod_util.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "base/strings/string16.h"
 #include "base/supports_user_data.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/common/web_preferences.h"
 
 class PrefService;
 class Profile;
 
 FORWARD_DECLARE_TEST(FontFamilyCacheTest, Caching);
 
 // Caches font family preferences associated with a PrefService. This class
 // relies on the assumption that each concatenation of map_name + '.' + script
 // is a unique string. It also relies on the assumption that the (const char*)
 // keys used in both inner and outer hash_maps are compile time constants.
 class FontFamilyCache : public base::SupportsUserData::Data,
                         public content::NotificationObserver {
  public:
   explicit FontFamilyCache(Profile* profile);
-  virtual ~FontFamilyCache();
+  ~FontFamilyCache() override;
 
   // Gets or creates the relevant FontFamilyCache, and then fills |map|.
   static void FillFontFamilyMap(Profile* profile,
                                 const char* map_name,
                                 content::ScriptFontFamilyMap* map);
 
   // Fills |map| with font family preferences.
   void FillFontFamilyMap(const char* map_name,
                          content::ScriptFontFamilyMap* map);
 
@@ skipping 24 matching lines @@
   // hash_maps.
   base::string16 FetchAndCacheFont(const char* script, const char* map_name);
 
   // Called when font family preferences changed.
   // Invalidates the cached entry, and removes the relevant observer.
   // Note: It is safe to remove the observer from the pref change callback.
   void OnPrefsChanged(const std::string& pref_name);
 
   // content::NotificationObserver override.
   // Called when the profile is being destructed.
-  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;
 
   // Cache of font family preferences.
   FontFamilyMap font_family_map_;
 
   // Weak reference.
   // Note: The lifetime of this object is tied to the lifetime of the
   // PrefService, so there is no worry about an invalid pointer.
   const PrefService* prefs_;
 
   // Reacts to profile changes.
   PrefChangeRegistrar profile_pref_registrar_;
 
   // Listens for profile destruction.
   content::NotificationRegistrar notification_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(FontFamilyCache);
 };
 
 #endif  // CHROME_BROWSER_FONT_FAMILY_CACHE_H_