Standardize usage of virtual/override/final in chrome/browser/notifications

chrome/browser/notifications/notification_browsertest.cc

 // Copyright (c) 2012 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 <deque>
 #include <string>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 54 matching lines @@
 
 class MessageCenterChangeObserver
     : public message_center::MessageCenterObserver,
       public NotificationChangeObserver {
  public:
   MessageCenterChangeObserver()
       : notification_received_(false) {
     message_center::MessageCenter::Get()->AddObserver(this);
   }
 
-  virtual ~MessageCenterChangeObserver() {
+  ~MessageCenterChangeObserver() override {
     message_center::MessageCenter::Get()->RemoveObserver(this);
   }
 
   // NotificationChangeObserver:
-  virtual bool Wait() override {
+  bool Wait() override {
     if (notification_received_)
       return true;
 
     message_loop_runner_ = new content::MessageLoopRunner;
     message_loop_runner_->Run();
     return notification_received_;
   }
 
   // message_center::MessageCenterObserver:
-  virtual void OnNotificationAdded(
-      const std::string& notification_id) override {
+  void OnNotificationAdded(const std::string& notification_id) override {
     OnMessageCenterChanged();
   }
 
-  virtual void OnNotificationRemoved(const std::string& notification_id,
-                                     bool by_user) override {
+  void OnNotificationRemoved(const std::string& notification_id,
+                             bool by_user) override {
     OnMessageCenterChanged();
   }
 
-  virtual void OnNotificationUpdated(
-      const std::string& notification_id) override {
+  void OnNotificationUpdated(const std::string& notification_id) override {
     OnMessageCenterChanged();
   }
 
   void OnMessageCenterChanged() {
     notification_received_ = true;
     if (message_loop_runner_.get())
       message_loop_runner_->Quit();
   }
 
   bool notification_received_;
@@ skipping 720 matching lines @@
       (*notifications.rbegin())->id());
 
   ASSERT_EQ(0, GetNotificationPopupCount());
 
   result = CreateNotification(
       browser(), true, "abc.png", "Title2", "Body2", "chat");
   EXPECT_NE("-1", result);
 
   ASSERT_EQ(1, GetNotificationPopupCount());
 }