Standardize usage of virtual/override/final in ui/

ui/app_list/cocoa/apps_search_results_controller_unittest.mm

 // Copyright 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/app_list/cocoa/apps_search_results_controller.h"
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 56 matching lines @@
         menu_ready_(true) {
     set_title(base::ASCIIToUTF16(title));
     set_details(base::ASCIIToUTF16(details));
     menu_model_.AddItem(0, base::UTF8ToUTF16("Menu For: " + title));
   }
 
   void SetMenuReadyForTesting(bool ready) {
     menu_ready_ = ready;
   }
 
-  virtual ui::MenuModel* GetContextMenuModel() override {
+  ui::MenuModel* GetContextMenuModel() override {
     if (!menu_ready_)
       return NULL;
 
     return &menu_model_;
   }
 
  private:
   ui::SimpleMenuModel menu_model_;
   bool menu_ready_;
 
@@ skipping 219 matching lines @@
   ModelResultAt(0)->NotifyItemUninstalled();
   [delegate_ performSelector:@selector(quitMessageLoop)
                   withObject:nil
                   afterDelay:0];
   message_loop.Run();
   EXPECT_EQ(1, [delegate_ redoSearchCount]);
 }
 
 }  // namespace test
 }  // namespace app_list