Standardize usage of virtual/override/final in ui/

ui/message_center/message_center_tray.cc

 // Copyright (c) 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.
 
 #include "ui/message_center/message_center_tray.h"
 
 #include "base/observer_list.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/models/simple_menu_model.h"
@@ skipping 11 matching lines @@
 const int kTogglePermissionCommand = 0;
 const int kShowSettingsCommand = 1;
 
 // The model of the context menu for a notification card.
 class NotificationMenuModel : public ui::SimpleMenuModel,
                               public ui::SimpleMenuModel::Delegate {
  public:
   NotificationMenuModel(MessageCenterTray* tray,
                         const NotifierId& notifier_id,
                         const base::string16& display_source);
-  virtual ~NotificationMenuModel();
+  ~NotificationMenuModel() override;
 
   // Overridden from ui::SimpleMenuModel::Delegate:
-  virtual bool IsCommandIdChecked(int command_id) const override;
-  virtual bool IsCommandIdEnabled(int command_id) const override;
-  virtual bool GetAcceleratorForCommandId(
-      int command_id,
-      ui::Accelerator* accelerator) override;
-  virtual void ExecuteCommand(int command_id, int event_flags) override;
+  bool IsCommandIdChecked(int command_id) const override;
+  bool IsCommandIdEnabled(int command_id) const override;
+  bool GetAcceleratorForCommandId(int command_id,
+                                  ui::Accelerator* accelerator) override;
+  void ExecuteCommand(int command_id, int event_flags) override;
 
  private:
   MessageCenterTray* tray_;
   NotifierId notifier_id_;
   DISALLOW_COPY_AND_ASSIGN(NotificationMenuModel);
 };
 
 NotificationMenuModel::NotificationMenuModel(
     MessageCenterTray* tray,
     const NotifierId& notifier_id,
@@ skipping 205 matching lines @@
     ShowPopupBubble();
 
   NotifyMessageCenterTrayChanged();
 }
 
 void MessageCenterTray::NotifyMessageCenterTrayChanged() {
   delegate_->OnMessageCenterTrayChanged();
 }
 
 }  // namespace message_center