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

chrome/browser/sessions/persistent_tab_restore_service.cc

 // 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.
 
 #include "chrome/browser/sessions/persistent_tab_restore_service.h"
 
 #include <cstring>  // memcpy
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 101 matching lines @@
 
 // PersistentTabRestoreService::Delegate ---------------------------------------
 
 // Implements the link between the tab restore service and the session backend.
 class PersistentTabRestoreService::Delegate
     : public BaseSessionService,
       public TabRestoreServiceHelper::Observer {
  public:
   explicit Delegate(Profile* profile);
 
-  virtual ~Delegate();
+  ~Delegate() override;
 
   // BaseSessionService:
-  virtual void Save() override;
+  void Save() override;
 
   // TabRestoreServiceHelper::Observer:
-  virtual void OnClearEntries() override;
-  virtual void OnRestoreEntryById(
-      SessionID::id_type id,
-      Entries::const_iterator entry_iterator) override;
-  virtual void OnAddEntry() override;
+  void OnClearEntries() override;
+  void OnRestoreEntryById(SessionID::id_type id,
+                          Entries::const_iterator entry_iterator) override;
+  void OnAddEntry() override;
 
   void set_tab_restore_service_helper(
       TabRestoreServiceHelper* tab_restore_service_helper) {
     tab_restore_service_helper_ = tab_restore_service_helper;
   }
 
   void LoadTabsFromLastSession();
 
   bool IsLoaded() const;
 
@@ skipping 840 matching lines @@
 }
 
 void PersistentTabRestoreService::PruneEntries() {
   helper_.PruneEntries();
 }
 
 KeyedService* TabRestoreServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   return new PersistentTabRestoreService(static_cast<Profile*>(profile), NULL);
 }