Standardize usage of virtual/override/final specifiers.

ui/message_center/views/notifier_settings_view_unittest.cc

Index: ui/message_center/views/notifier_settings_view_unittest.cc
diff --git a/ui/message_center/views/notifier_settings_view_unittest.cc b/ui/message_center/views/notifier_settings_view_unittest.cc
index df9ce16e2fe4f277fb27da160160c34e6994cda0..1c0841f3151802076c10f8510481f2e029efd0ab 100644
--- a/ui/message_center/views/notifier_settings_view_unittest.cc
+++ b/ui/message_center/views/notifier_settings_view_unittest.cc
@@ -28,14 +28,14 @@ class TestingNotifierSettingsProvider
       : FakeNotifierSettingsProvider(notifiers),
         settings_handler_id_(settings_handler_id),
         request_count_(0u) {}
-  virtual ~TestingNotifierSettingsProvider() {}
+  ~TestingNotifierSettingsProvider() override {}
 
-  virtual bool NotifierHasAdvancedSettings(const NotifierId& notifier_id) const
-      override {
+  bool NotifierHasAdvancedSettings(
+      const NotifierId& notifier_id) const override {
     return notifier_id == settings_handler_id_;
   }
 
-  virtual void OnNotifierAdvancedSettingsRequested(
+  void OnNotifierAdvancedSettingsRequested(
       const NotifierId& notifier_id,
       const std::string* notification_id) override {
     request_count_++;
@@ -58,10 +58,10 @@ class TestingNotifierSettingsProvider
 class NotifierSettingsViewTest : public testing::Test {
  public:
   NotifierSettingsViewTest();
-  virtual ~NotifierSettingsViewTest();
+  ~NotifierSettingsViewTest() override;
 
-  virtual void SetUp() override;
-  virtual void TearDown() override;
+  void SetUp() override;
+  void TearDown() override;
 
   NotifierSettingsView* GetView() const;
   TestingNotifierSettingsProvider* settings_provider() const {