Standardize usage of virtual/override/final in base/

base/values_unittest.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 <limits>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 159 matching lines @@
   explicit DeletionTestValue(bool* deletion_flag) : Value(TYPE_NULL) {
     Init(deletion_flag);  // Separate function so that we can use ASSERT_*
   }
 
   void Init(bool* deletion_flag) {
     ASSERT_TRUE(deletion_flag);
     deletion_flag_ = deletion_flag;
     *deletion_flag_ = false;
   }
 
-  virtual ~DeletionTestValue() {
-    *deletion_flag_ = true;
-  }
+  ~DeletionTestValue() override { *deletion_flag_ = true; }
 
  private:
   bool* deletion_flag_;
 };
 
 TEST(ValuesTest, ListDeletion) {
   bool deletion_flag = true;
 
   {
     ListValue list;
@@ skipping 895 matching lines @@
   EXPECT_FALSE(main_list.GetList(1, NULL));
   EXPECT_FALSE(main_list.GetList(2, NULL));
   EXPECT_FALSE(main_list.GetList(3, NULL));
   EXPECT_FALSE(main_list.GetList(4, NULL));
   EXPECT_FALSE(main_list.GetList(5, NULL));
   EXPECT_TRUE(main_list.GetList(6, NULL));
   EXPECT_FALSE(main_list.GetList(7, NULL));
 }
 
 }  // namespace base