Standardize usage of virtual/override/final in chrome/browser/browsing_data/

chrome/browser/browsing_data/browsing_data_remover_browsertest.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 "base/files/file_path.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browsing_data/browsing_data_helper.h"
 #include "chrome/browser/browsing_data/browsing_data_remover.h"
 #include "chrome/browser/browsing_data/browsing_data_remover_test_util.h"
@@ skipping 20 matching lines @@
 void SetUrlRequestMock(const base::FilePath& path) {
   net::URLRequestMockHTTPJob::AddUrlHandler(path,
                                             BrowserThread::GetBlockingPool());
 }
 }
 
 class BrowsingDataRemoverBrowserTest : public InProcessBrowserTest {
  public:
   BrowsingDataRemoverBrowserTest() {}
 
-  virtual void SetUpOnMainThread() override {
+  void SetUpOnMainThread() override {
     base::FilePath path;
     PathService::Get(content::DIR_TEST_DATA, &path);
     BrowserThread::PostTask(
         BrowserThread::IO, FROM_HERE, base::Bind(&SetUrlRequestMock, path));
   }
 
   void RunScriptAndCheckResult(const std::string& script,
                                const std::string& result) {
     std::string data;
     ASSERT_TRUE(content::ExecuteScriptAndExtractString(
@@ skipping 78 matching lines @@
   ui_test_utils::NavigateToURL(browser(), url);
   RunScriptAndCheckResult("createTable()", "done");
   RunScriptAndCheckResult("insertRecord('text2')", "done");
   RunScriptAndCheckResult("getRecords()", "text2");
 }
 
 // Profile::ClearNetworkingHistorySince should be exercised here too see whether
 // the call gets delegated through ProfileIO[Impl]Data properly, which is hard
 // to write unit-tests for. Currently this is done by both of the above tests.
 // Add standalone test if this changes.