Standardize usage of virtual/override/final specifiers.

chrome/browser/signin/signin_error_notifier_ash.cc

 // 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.
 
 #include "chrome/browser/signin/signin_error_notifier_ash.h"
 
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/system/system_notifier.h"
 #include "base/logging.h"
@@ skipping 32 matching lines @@
 
 const char kProfileSigninNotificationId[] = "chrome://settings/signin/";
 
 // A notification delegate for the sign-out button.
 class SigninNotificationDelegate : public NotificationDelegate {
  public:
   SigninNotificationDelegate(const std::string& id,
                              Profile* profile);
 
   // NotificationDelegate:
-  virtual void Display() override;
-  virtual void Error() override;
-  virtual void Close(bool by_user) override;
-  virtual bool HasClickedListener() override;
-  virtual void Click() override;
-  virtual void ButtonClick(int button_index) override;
-  virtual std::string id() const override;
+  void Display() override;
+  void Error() override;
+  void Close(bool by_user) override;
+  bool HasClickedListener() override;
+  void Click() override;
+  void ButtonClick(int button_index) override;
+  std::string id() const override;
 
  protected:
-  virtual ~SigninNotificationDelegate();
+  ~SigninNotificationDelegate() override;
 
  private:
   void FixSignIn();
 
   // Unique id of the notification.
   const std::string id_;
 
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninNotificationDelegate);
@@ skipping 160 matching lines @@
       return l10n_util::GetStringUTF16(
           IDS_SYNC_UNAVAILABLE_ERROR_BUBBLE_VIEW_MESSAGE);
       break;
 
     // Generic message for "other" errors.
     default:
       return l10n_util::GetStringUTF16(
           IDS_SYNC_OTHER_SIGN_IN_ERROR_BUBBLE_VIEW_MESSAGE);
   }
 }