Standardize usage of virtual/override/final specifiers.

chrome/browser/sessions/better_session_restore_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/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
@@ skipping 565 matching lines @@
   // The form data contained passwords, so it's removed completely.
   CheckFormRestored(new_browser, false, false);
 }
 
 // ChromeOS does not override the SessionStartupPreference upon controlled
 // system restart.
 #if !defined(OS_CHROMEOS)
 class RestartTest : public BetterSessionRestoreTest {
  public:
   RestartTest() { }
-  virtual ~RestartTest() { }
+  ~RestartTest() override {}
+
  protected:
   void Restart() {
     // Simulate restarting the browser, but let the test exit peacefully.
     for (chrome::BrowserIterator it; !it.done(); it.Next())
       content::BrowserContext::SaveSessionState(it->profile());
     PrefService* pref_service = g_browser_process->local_state();
     pref_service->SetBoolean(prefs::kWasRestarted, true);
 #if defined(OS_WIN)
     if (pref_service->HasPrefPath(prefs::kRelaunchMode))
       pref_service->ClearPref(prefs::kRelaunchMode);
@@ skipping 239 matching lines @@
   CookieSettings::Factory::GetForProfile(new_browser->profile())->
       SetDefaultCookieSetting(CONTENT_SETTING_SESSION_ONLY);
   // ... even if background mode is active.
   EnableBackgroundMode();
   new_browser = QuitBrowserAndRestore(new_browser, true);
   StoreDataWithPage(new_browser, "cookies.html");
   DisableBackgroundMode();
   new_browser = QuitBrowserAndRestore(new_browser, true);
   StoreDataWithPage(new_browser, "cookies.html");
 }