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

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

Index: chrome/browser/chromeos/login/screens/mock_eula_screen.h
diff --git a/chrome/browser/chromeos/login/screens/mock_eula_screen.h b/chrome/browser/chromeos/login/screens/mock_eula_screen.h
index 36a015d415f0bf3b6880b505ebb1efe53277fb60..218675090c7c0fbfb2f6efd159c58168999be19c 100644
--- a/chrome/browser/chromeos/login/screens/mock_eula_screen.h
+++ b/chrome/browser/chromeos/login/screens/mock_eula_screen.h
@@ -23,10 +23,10 @@ class MockEulaScreen : public EulaScreen {
 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());