replace OVERRIDE and FINAL with override and final in chrome/browser/chromeos/

chrome/browser/chromeos/extensions/extension_system_event_observer.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_CHROMEOS_EXTENSIONS_EXTENSION_SYSTEM_EVENT_OBSERVER_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_EXTENSION_SYSTEM_EVENT_OBSERVER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chromeos/dbus/power_manager_client.h"
 #include "chromeos/dbus/session_manager_client.h"
 
 namespace chromeos {
 
 // Dispatches extension events in response to system events.
 class ExtensionSystemEventObserver : public PowerManagerClient::Observer,
                                      public SessionManagerClient::Observer {
  public:
   // This class registers/unregisters itself as an observer in ctor/dtor.
   ExtensionSystemEventObserver();
   virtual ~ExtensionSystemEventObserver();
 
   // PowerManagerClient::Observer overrides:
-  virtual void BrightnessChanged(int level, bool user_initiated) OVERRIDE;
-  virtual void SuspendDone(const base::TimeDelta& sleep_duration) OVERRIDE;
+  virtual void BrightnessChanged(int level, bool user_initiated) override;
+  virtual void SuspendDone(const base::TimeDelta& sleep_duration) override;
 
   // SessionManagerClient::Observer override.
-  virtual void ScreenIsUnlocked() OVERRIDE;
+  virtual void ScreenIsUnlocked() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ExtensionSystemEventObserver);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_EXTENSION_SYSTEM_EVENT_OBSERVER_H_