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

chrome/browser/ui/webui/history_ui.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_UI_WEBUI_HISTORY_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_HISTORY_UI_H_
 
 #include <string>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 71 matching lines @@
     base::string16 snippet;
 
     // Whether this entry was blocked when it was attempted.
     bool blocked_visit;
 
     // kAcceptLanguages pref value.
     std::string accept_languages;
   };
 
   BrowsingHistoryHandler();
-  virtual ~BrowsingHistoryHandler();
+  ~BrowsingHistoryHandler() override;
 
   // WebUIMessageHandler implementation.
-  virtual void RegisterMessages() override;
+  void RegisterMessages() override;
 
   // Handler for the "queryHistory" message.
   void HandleQueryHistory(const base::ListValue* args);
 
   // Handler for the "removeVisits" message.
   void HandleRemoveVisits(const base::ListValue* args);
 
   // Handler for "clearBrowsingData" message.
   void HandleClearBrowsingData(const base::ListValue* args);
 
   // Handler for "removeBookmark" message.
   void HandleRemoveBookmark(const base::ListValue* args);
 
   // content::NotificationObserver implementation.
-  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;
 
   // Merges duplicate entries from the query results, only retaining the most
   // recent visit to a URL on a particular day. That visit contains the
   // timestamps of the other visits.
   static void MergeDuplicateResults(
       std::vector<BrowsingHistoryHandler::HistoryEntry>* results);
 
  private:
   // The range for which to return results:
   // - ALLTIME: allows access to all the results in a paginated way.
@@ skipping 87 matching lines @@
   explicit HistoryUI(content::WebUI* web_ui);
 
   static base::RefCountedMemory* GetFaviconResourceBytes(
       ui::ScaleFactor scale_factor);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HistoryUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_HISTORY_UI_H_