replace OVERRIDE and FINAL with override and final in athena/

athena/extensions/chrome/athena_chrome_app_window_client.h

 // 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.
 
 #ifndef ATHENA_EXTENSIONS_CHROME_ATHENA_CHROME_APP_WINDOW_CLIENT_H_
 #define ATHENA_EXTENSIONS_CHROME_ATHENA_CHROME_APP_WINDOW_CLIENT_H_
 
 #include "athena/extensions/athena_app_window_client_base.h"
 #include "base/macros.h"
 
 namespace athena {
 
 // The implementation of AppWindowClient for Athena.
 class AthenaChromeAppWindowClient : public AthenaAppWindowClientBase {
  public:
   AthenaChromeAppWindowClient();
   virtual ~AthenaChromeAppWindowClient();
 
  private:
   // extensions::AppWindowClient
   virtual extensions::AppWindow* CreateAppWindow(
       content::BrowserContext* context,
-      const extensions::Extension* extension) OVERRIDE;
+      const extensions::Extension* extension) override;
   virtual void OpenDevToolsWindow(content::WebContents* web_contents,
-                                  const base::Closure& callback) OVERRIDE;
-  virtual bool IsCurrentChannelOlderThanDev() OVERRIDE;
+                                  const base::Closure& callback) override;
+  virtual bool IsCurrentChannelOlderThanDev() override;
 
   DISALLOW_COPY_AND_ASSIGN(AthenaChromeAppWindowClient);
 };
 
 }  // namespace athena
 
 #endif  // ATHENA_EXTENSIONS_CHROME_ATHENA_CHROME_APP_WINDOW_CLIENT_H_