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

chrome/browser/ui/panels/test_panel_collection_squeeze_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_COLLECTION_SQUEEZE_OBSERVER_H_
 #define CHROME_BROWSER_UI_PANELS_TEST_PANEL_COLLECTION_SQUEEZE_OBSERVER_H_
 
 #include "chrome/browser/ui/panels/test_panel_notification_observer.h"
 
 class DockedPanelCollection;
 class Panel;
 
 // Custom notification observer for waiting on panel collection that squeezes
 // its panels to reflect a certain state.
 // Modeled after ui_test_utils notification observers.
 class PanelCollectionSqueezeObserver : public TestPanelNotificationObserver {
  public:
   // Register to listen for panel collection updated notifications
   // from the specified collection to detect a change to the state
   // where the |active_panel| is at full width and all other
   // panels in the collection are squeezed.
   PanelCollectionSqueezeObserver(DockedPanelCollection* collection,
                                  Panel* active_panel);
-  virtual ~PanelCollectionSqueezeObserver();
+  ~PanelCollectionSqueezeObserver() override;
 
  private:
   // TestNotificationObserver override:
-  virtual bool AtExpectedState() override;
+  bool AtExpectedState() override;
 
   bool IsSqueezed(Panel* panel);
 
   DockedPanelCollection* panel_collection_;
   Panel* active_panel_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelCollectionSqueezeObserver);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_TEST_PANEL_COLLECTION_SQUEEZE_OBSERVER_H_