chromeos: Add missing OVERRIDE annotation to classes implementing TabContentsDelegate::IsPopup

chrome/browser/chromeos/login/web_page_screen.h

 // Copyright (c) 2011 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_LOGIN_WEB_PAGE_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_WEB_PAGE_SCREEN_H_
 #pragma once
 
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
 #include "base/timer.h"
 #include "chrome/browser/chromeos/login/screen_observer.h"
 #include "content/browser/tab_contents/tab_contents_delegate.h"
 
 class GURL;
 
 namespace chromeos {
 
 // Base class for wizard screen that holds web page.
 class WebPageScreen : public TabContentsDelegate {
  public:
   explicit WebPageScreen();
   virtual ~WebPageScreen();
 
   // Exits from the screen with the specified exit code.
   virtual void CloseScreen(ScreenObserver::ExitCodes code) = 0;
 
  protected:
   // TabContentsDelegate implementation:
-  virtual bool IsPopup(TabContents* source);
   virtual bool ShouldAddNavigationToHistory(
       const history::HistoryAddPageArgs& add_page_args,
-      content::NavigationType navigation_type);
-  virtual bool HandleContextMenu(const ContextMenuParams& params);
+      content::NavigationType navigation_type) OVERRIDE;
+  virtual bool HandleContextMenu(const ContextMenuParams& params) OVERRIDE;
 
   // Called by |timeout_timer_|. Stops page fetching and closes screen.
   virtual void OnNetworkTimeout();
 
   // Start/stop timeout timer.
   void StartTimeoutTimer();
   void StopTimeoutTimer();
 
  private:
   // Timer used for network response timeout.
   base::OneShotTimer<WebPageScreen> timeout_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(WebPageScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_WEB_PAGE_SCREEN_H_