Update {virtual,override,final} to follow C++11 style.

chrome/browser/android/bookmarks/partner_bookmarks_shim.h

 // Copyright 2013 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_ANDROID_BOOKMARKS_PARTNER_BOOKMARKS_SHIM_H_
 #define CHROME_BROWSER_ANDROID_BOOKMARKS_PARTNER_BOOKMARKS_SHIM_H_
 
 #include "base/android/jni_weak_ref.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
@@ skipping 103 matching lines @@
       content::BrowserContext* browser_context);
 
   // For testing: clears partner bookmark model data.
   static void ClearPartnerModelForTesting();
 
   // For testing: re-enables partner bookmarks editing.
   static void EnablePartnerBookmarksEditing();
 
  private:
   explicit PartnerBookmarksShim(PrefService* prefs);
-  virtual ~PartnerBookmarksShim();
+  ~PartnerBookmarksShim() override;
 
   const BookmarkNode* GetNodeByID(const BookmarkNode* parent, int64 id) const;
   void ReloadNodeMapping();
   void SaveNodeMapping();
 
   scoped_ptr<BookmarkNode> partner_bookmarks_root_;
   PrefService* prefs_;
   NodeRenamingMap node_rename_remove_map_;
 
   // The observers.
   ObserverList<Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(PartnerBookmarksShim);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_BOOKMARKS_PARTNER_BOOKMARKS_SHIM_H_