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

chrome/browser/sessions/tab_restore_service.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_SESSIONS_TAB_RESTORE_SERVICE_H_
 #define CHROME_BROWSER_SESSIONS_TAB_RESTORE_SERVICE_H_
 
 #include <list>
 #include <string>
 #include <vector>
@@ skipping 59 matching lines @@
 
     // Is this entry from the last session? This is set to true for entries that
     // were closed during the last session, and false for entries that were
     // closed during this session.
     bool from_last_session;
   };
 
   // Represents a previously open tab.
   struct Tab : public Entry {
     Tab();
-    virtual ~Tab();
+    ~Tab() override;
 
     bool has_browser() const { return browser_id > 0; }
 
     // The navigations.
     std::vector<sessions::SerializedNavigationEntry> navigations;
 
     // Index of the selected navigation in navigations.
     int current_navigation_index;
 
     // The ID of the browser to which this tab belonged, so it can be restored
@@ skipping 12 matching lines @@
     // The associated session storage namespace (if any).
     scoped_refptr<content::SessionStorageNamespace> session_storage_namespace;
 
     // The user agent override used for the tab's navigations (if applicable).
     std::string user_agent_override;
   };
 
   // Represents a previously open window.
   struct Window : public Entry {
     Window();
-    virtual ~Window();
+    ~Window() override;
 
     // The tabs that comprised the window, in order.
     std::vector<Tab> tabs;
 
     // Index of the selected tab.
     int selected_tab_index;
 
     // If an application window, the name of the app.
     std::string app_name;
   };
 
   typedef std::list<Entry*> Entries;
 
-  virtual ~TabRestoreService();
+  ~TabRestoreService() override;
 
   // Adds/removes an observer. TabRestoreService does not take ownership of
   // the observer.
   virtual void AddObserver(TabRestoreServiceObserver* observer) = 0;
   virtual void RemoveObserver(TabRestoreServiceObserver* observer) = 0;
 
   // Creates a Tab to represent |contents| and notifies observers the list of
   // entries has changed.
   virtual void CreateHistoricalTab(content::WebContents* contents,
                                    int index) = 0;
@@ skipping 45 matching lines @@
   virtual void LoadTabsFromLastSession() = 0;
 
   // Returns true if the tab entries have been loaded.
   virtual bool IsLoaded() const = 0;
 
   // Deletes the last session.
   virtual void DeleteLastSession() = 0;
 };
 
 #endif  // CHROME_BROWSER_SESSIONS_TAB_RESTORE_SERVICE_H_