Standardize usage of virtual/override/final specifiers.

components/visitedlink/test/visitedlink_perftest.cc

 // Copyright (c) 2010 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 <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 46 matching lines @@
 // within the given range
 void FillTable(VisitedLinkMaster& master, const char* prefix,
                int begin, int end) {
   for (int i = begin; i < end; i++)
     master.AddURL(TestURL(prefix, i));
 }
 
 class VisitedLink : public testing::Test {
  protected:
   base::FilePath db_path_;
-  virtual void SetUp() {
-    ASSERT_TRUE(base::CreateTemporaryFile(&db_path_));
-  }
-  virtual void TearDown() {
-    base::DeleteFile(db_path_, false);
-  }
+  void SetUp() override { ASSERT_TRUE(base::CreateTemporaryFile(&db_path_)); }
+  void TearDown() override { base::DeleteFile(db_path_, false); }
 };
 
 } // namespace
 
 // This test tests adding many things to a database, and how long it takes
 // to query the database with different numbers of things in it. The time
 // is the total time to do all the operations, and as such, it is only
 // useful for a regression test. If there is a regression, it might be
 // useful to make another set of tests to test these things in isolation.
 TEST_F(VisitedLink, TestAddAndQuery) {
@@ skipping 109 matching lines @@
     cold_sum += cold_load_times[i];
     hot_sum += hot_load_times[i];
   }
   base::LogPerfResult(
       "Visited_link_cold_load_time", cold_sum / cold_load_times.size(), "ms");
   base::LogPerfResult(
       "Visited_link_hot_load_time", hot_sum / hot_load_times.size(), "ms");
 }
 
 }  // namespace visitedlink