Standardize usage of virtual/override/final in ui/

ui/message_center/cocoa/notification_controller_unittest.mm

 // Copyright (c) 2013 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.
 
 #import "ui/message_center/cocoa/notification_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 11 matching lines @@
 
 namespace {
 
 class MockMessageCenter : public message_center::FakeMessageCenter {
  public:
   MockMessageCenter()
       : last_removed_by_user_(false),
         remove_count_(0),
         last_clicked_index_(-1) {}
 
-  virtual void RemoveNotification(const std::string& id,
-                                  bool by_user) override {
+  void RemoveNotification(const std::string& id, bool by_user) override {
     last_removed_id_ = id;
     last_removed_by_user_ = by_user;
     ++remove_count_;
   }
 
-  virtual void ClickOnNotificationButton(const std::string& id,
-                                         int button_index) override {
+  void ClickOnNotificationButton(const std::string& id,
+                                 int button_index) override {
     last_clicked_id_ = id;
     last_clicked_index_ = button_index;
   }
 
   const std::string& last_removed_id() const { return last_removed_id_; }
   bool last_removed_by_user() const { return last_removed_by_user_; }
   int remove_count() const { return remove_count_; }
   const std::string& last_clicked_id() const { return last_clicked_id_; }
   int last_clicked_index() const { return last_clicked_index_; }
 
@@ skipping 380 matching lines @@
   notification->set_title(ASCIIToUTF16("one line"));
   [controller updateNotification:notification.get()];
   EXPECT_EQ(1u, compute_message_lines());
 
   notification->set_title(ASCIIToUTF16("two\nlines"));
   [controller updateNotification:notification.get()];
   EXPECT_EQ(0u, compute_message_lines());
 }
 
 }  // namespace message_center