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

chrome/browser/ui/panels/test_panel_active_state_observer.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_PANELS_TEST_PANEL_ACTIVE_STATE_OBSERVER_H_
 #define CHROME_BROWSER_UI_PANELS_TEST_PANEL_ACTIVE_STATE_OBSERVER_H_
 
 #include "chrome/browser/ui/panels/test_panel_notification_observer.h"
 
 class Panel;
 
 // Custom notification observer for waiting on panel active state.
 // Modeled after ui_test_utils notification observers.
 class PanelActiveStateObserver : public TestPanelNotificationObserver {
  public:
   // Register to listen for panel active state change notifications
   // for the specified panel to detect a change to the expected active
   // state.
   PanelActiveStateObserver(Panel* panel, bool expect_active);
-  virtual ~PanelActiveStateObserver();
+  ~PanelActiveStateObserver() override;
 
  private:
   // TestNotificationObserver override:
-  virtual bool AtExpectedState() override;
+  bool AtExpectedState() override;
 
   Panel* panel_;
   bool expect_active_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelActiveStateObserver);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_TEST_PANEL_ACTIVE_STATE_OBSERVER_H_