It is time.

ui/views/examples/radio_button_example.h

-// Copyright (c) 2011 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 UI_VIEWS_EXAMPLES_RADIO_BUTTON_EXAMPLE_H_
-#define UI_VIEWS_EXAMPLES_RADIO_BUTTON_EXAMPLE_H_
-
-#include <string>
-
-#include "base/macros.h"
-#include "ui/views/controls/button/button.h"
-#include "ui/views/examples/example_base.h"
-
-namespace views {
-
-class LabelButton;
-class RadioButton;
-
-namespace examples {
-
-class VIEWS_EXAMPLES_EXPORT RadioButtonExample : public ExampleBase,
-                                                 public ButtonListener {
- public:
-  RadioButtonExample();
-  virtual ~RadioButtonExample();
-
-  // ExampleBase:
-  virtual void CreateExampleView(View* container) override;
-
- private:
-  // ButtonListener:
-  virtual void ButtonPressed(Button* sender, const ui::Event& event) override;
-
-  // Group of 3 radio buttons.
-  RadioButton* radio_buttons_[3];
-
-  // Control button to select radio buttons, and show the status of buttons.
-  LabelButton* select_;
-  LabelButton* status_;
-
-  // The number of times the button is pressed.
-  int count_;
-
-  DISALLOW_COPY_AND_ASSIGN(RadioButtonExample);
-};
-
-}  // namespace examples
-}  // namespace views
-
-#endif  // UI_VIEWS_EXAMPLES_RADIO_BUTTON_EXAMPLE_H_