Standardize usage of virtual/override/final specifiers.

chrome/browser/autocomplete/history_url_provider_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 "chrome/browser/autocomplete/history_url_provider.h"
 
 #include <algorithm>
 
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
@@ skipping 145 matching lines @@
   struct UrlAndLegalDefault {
     std::string url;
     bool allowed_to_be_default_match;
   };
 
   HistoryURLProviderTest()
       : sort_matches_(false) {
     HistoryQuickProvider::set_disabled(true);
   }
 
-  virtual ~HistoryURLProviderTest() {
+  ~HistoryURLProviderTest() override {
     HistoryQuickProvider::set_disabled(false);
   }
 
   // AutocompleteProviderListener:
   void OnProviderUpdate(bool updated_matches) override;
 
  protected:
   static KeyedService* CreateTemplateURLService(
       content::BrowserContext* context) {
     Profile* profile = static_cast<Profile*>(context);
@@ skipping 846 matching lines @@
     // Test the experiment (scoring enabled).
     autocomplete_->scoring_params_.experimental_scoring_enabled = true;
     ASSERT_NO_FATAL_FAILURE(RunTest(ASCIIToUTF16(test_cases[i].input),
                                     std::string(), false, output, max_matches));
     for (int j = 0; j < max_matches; ++j) {
       EXPECT_EQ(test_cases[i].matches[j].experiment_relevance,
                 matches_[j].relevance);
     }
   }
 }