Update {virtual,override,final} to follow C++11 style in chrome/browser/chromeos/login.

chrome/browser/chromeos/login/login_ui_browsertest.cc

Index: chrome/browser/chromeos/login/login_ui_browsertest.cc
diff --git a/chrome/browser/chromeos/login/login_ui_browsertest.cc b/chrome/browser/chromeos/login/login_ui_browsertest.cc
index 7193dfdda6e598601565b957c956b77e1cfbc36b..24f66df0f3169f4312d47a49f008c5a025152117 100644
--- a/chrome/browser/chromeos/login/login_ui_browsertest.cc
+++ b/chrome/browser/chromeos/login/login_ui_browsertest.cc
@@ -38,7 +38,7 @@ class LoginUITest : public chromeos::LoginManagerTest {
     screenshot_testing_->IgnoreArea(areas::kSecondUserpod);
     AddMixin(screenshot_testing_);
   }
-  virtual ~LoginUITest() {}
+  ~LoginUITest() override {}
 
  protected:
   ScreenshotTestingMixin* screenshot_testing_;