Update {virtual,override,final} to follow C++11 style in chrome/browser/chromeos/login.

chrome/browser/chromeos/login/signin/merge_session_load_page.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 CHROME_BROWSER_CHROMEOS_LOGIN_SIGNIN_MERGE_SESSION_LOAD_PAGE_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SIGNIN_MERGE_SESSION_LOAD_PAGE_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 29 matching lines @@
   // Create a merge session load delay page for the |web_contents|.
   // The |callback| will be run on the IO thread.
   MergeSessionLoadPage(
       content::WebContents* web_contents,
       const GURL& url,
       const MergeSessionThrottle::CompletionCallback& callback);
 
   void Show();
 
  protected:
-  virtual ~MergeSessionLoadPage();
+  ~MergeSessionLoadPage() override;
 
  private:
   friend class TestMergeSessionLoadPage;
 
   // InterstitialPageDelegate implementation.
-  virtual std::string GetHTMLContents() override;
-  virtual void CommandReceived(const std::string& command) override;
-  virtual void OverrideRendererPrefs(
-      content::RendererPreferences* prefs) override;
-  virtual void OnProceed() override;
-  virtual void OnDontProceed() override;
+  std::string GetHTMLContents() override;
+  void CommandReceived(const std::string& command) override;
+  void OverrideRendererPrefs(content::RendererPreferences* prefs) override;
+  void OnProceed() override;
+  void OnDontProceed() override;
 
   // OAuth2LoginManager::Observer overrides.
-  virtual void OnSessionRestoreStateChanged(
+  void OnSessionRestoreStateChanged(
       Profile* user_profile,
       OAuth2LoginManager::SessionRestoreState state) override;
 
   void NotifyBlockingPageComplete();
 
   // Helper function to get OAuth2LoginManager out of |web_contents_|.
   OAuth2LoginManager* GetOAuth2LoginManager();
 
   MergeSessionThrottle::CompletionCallback callback_;
 
   // True if the proceed is chosen.
   bool proceeded_;
 
   content::WebContents* web_contents_;
   GURL url_;
   content::InterstitialPage* interstitial_page_;  // Owns us.
 
   DISALLOW_COPY_AND_ASSIGN(MergeSessionLoadPage);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SIGNIN_MERGE_SESSION_LOAD_PAGE_H_