Update {virtual,override} to follow C++11 style in chrome.

chrome/browser/chromeos/login/screens/mock_eula_screen.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_MOCK_EULA_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_MOCK_EULA_SCREEN_H_
 
 #include "chrome/browser/chromeos/login/screens/base_screen_delegate.h"
 #include "chrome/browser/chromeos/login/screens/eula_screen.h"
 #include "chrome/browser/chromeos/login/screens/eula_view.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace chromeos {
 
 class MockEulaScreen : public EulaScreen {
  public:
   MockEulaScreen(BaseScreenDelegate* base_screen_delegate,
                  Delegate* delegate,
                  EulaView* view);
   ~MockEulaScreen() override;
 };
 
 class MockEulaView : public EulaView {
  public:
   MockEulaView();
-  virtual ~MockEulaView();
+  ~MockEulaView() override;
 
-  virtual void Bind(EulaModel& model) override;
-  virtual void Unbind() override;
+  void Bind(EulaModel& model) override;
+  void Unbind() override;
 
   MOCK_METHOD0(PrepareToShow, void());
   MOCK_METHOD0(Show, void());
   MOCK_METHOD0(Hide, void());
 
   MOCK_CONST_METHOD0(GetName, std::string());
 
   MOCK_METHOD1(MockBind, void(EulaModel& model));
   MOCK_METHOD0(MockUnbind, void());
   MOCK_METHOD1(OnPasswordFetched, void(const std::string& tpm_password));
 
  private:
   EulaModel* model_;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_MOCK_EULA_SCREEN_H_