Standardize usage of virtual/override/final specifiers.

chrome/browser/notifications/extension_welcome_notification_unittest.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/notifications/extension_welcome_notification.h"
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 110 matching lines @@
 };
 
 class ExtensionWelcomeNotificationTest : public testing::Test {
  protected:
   ExtensionWelcomeNotificationTest() {
     scoped_refptr<user_prefs::PrefRegistrySyncable> pref_registry(
         new user_prefs::PrefRegistrySyncable());
     ExtensionWelcomeNotification::RegisterProfilePrefs(pref_registry.get());
   }
 
-  virtual void SetUp() {
+  void SetUp() override {
     task_runner_ = new base::TestSimpleTaskRunner();
     thread_task_runner_handle_.reset(
         new base::ThreadTaskRunnerHandle(task_runner_));
     profile_.reset(new TestingProfile());
     delegate_ = new WelcomeNotificationDelegate();
     welcome_notification_.reset(
         ExtensionWelcomeNotification::Create(profile_.get(), delegate_));
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     delegate_ = NULL;
     welcome_notification_.reset();
     profile_.reset();
     thread_task_runner_handle_.reset();
     task_runner_ = NULL;
   }
 
   void StartPreferenceSyncing() const {
     PrefServiceSyncable::FromProfile(profile_.get())
         ->GetSyncableService(syncer::PREFERENCES)
@@ skipping 381 matching lines @@
 
   EXPECT_TRUE(task_runner()->GetPendingTasks().empty());
   EXPECT_EQ(message_center()->add_notification_calls(), 0);
   EXPECT_EQ(message_center()->remove_notification_calls(), 0);
   EXPECT_EQ(message_center()->notifications_with_shown_as_popup(), 0);
   EXPECT_FALSE(GetBooleanPref(prefs::kWelcomeNotificationDismissed));
   EXPECT_TRUE(GetBooleanPref(prefs::kWelcomeNotificationDismissedLocal));
   EXPECT_TRUE(GetBooleanPref(prefs::kWelcomeNotificationPreviouslyPoppedUp));
   EXPECT_EQ(GetInt64Pref(prefs::kWelcomeNotificationExpirationTimestamp), 1);
 }