Standardize usage of virtual/override/final in extensions/

extensions/browser/extension_prefs.cc

 // 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.
 
 #include "extensions/browser/extension_prefs.h"
 
 #include <iterator>
 
 #include "base/command_line.h"
 #include "base/prefs/pref_notifier.h"
@@ skipping 183 matching lines @@
 const char kCorruptedDisableCount[] = "extensions.corrupted_disable_count";
 
 // Provider of write access to a dictionary storing extension prefs.
 class ScopedExtensionPrefUpdate : public DictionaryPrefUpdate {
  public:
   ScopedExtensionPrefUpdate(PrefService* service,
                             const std::string& extension_id) :
     DictionaryPrefUpdate(service, pref_names::kExtensions),
     extension_id_(extension_id) {}
 
-  virtual ~ScopedExtensionPrefUpdate() {
-  }
+  ~ScopedExtensionPrefUpdate() override {}
 
   // DictionaryPrefUpdate overrides:
-  virtual base::DictionaryValue* Get() override {
+  base::DictionaryValue* Get() override {
     base::DictionaryValue* dict = DictionaryPrefUpdate::Get();
     base::DictionaryValue* extension = NULL;
     if (!dict->GetDictionary(extension_id_, &extension)) {
       // Extension pref does not exist, create it.
       extension = new base::DictionaryValue();
       dict->SetWithoutPathExpansion(extension_id_, extension);
     }
     return extension;
   }
 
@@ skipping 1883 matching lines @@
   extension_pref_value_map_->RegisterExtension(
       extension_id, install_time, is_enabled, is_incognito_enabled);
 
   FOR_EACH_OBSERVER(
       ExtensionPrefsObserver,
       observer_list_,
       OnExtensionRegistered(extension_id, install_time, is_enabled));
 }
 
 }  // namespace extensions