It is time.

ui/views/controls/button/radio_button.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 UI_VIEWS_CONTROLS_BUTTON_RADIO_BUTTON_H_
-#define UI_VIEWS_CONTROLS_BUTTON_RADIO_BUTTON_H_
-
-#include "base/strings/string16.h"
-#include "ui/views/controls/button/checkbox.h"
-
-namespace views {
-
-// A native themed class representing a radio button.  This class does not use
-// platform specific objects to replicate the native platforms looks and feel.
-class VIEWS_EXPORT RadioButton : public Checkbox {
- public:
-  // The button's class name.
-  static const char kViewClassName[];
-
-  RadioButton(const base::string16& label, int group_id);
-  virtual ~RadioButton();
-
-  // Overridden from View:
-  virtual const char* GetClassName() const override;
-  virtual void GetAccessibleState(ui::AXViewState* state) override;
-  virtual View* GetSelectedViewForGroup(int group) override;
-  virtual bool IsGroupFocusTraversable() const override;
-  virtual void OnFocus() override;
-
-  // Overridden from Button:
-  virtual void NotifyClick(const ui::Event& event) override;
-
-  // Overridden from LabelButton:
-  virtual ui::NativeTheme::Part GetThemePart() const override;
-
-  // Overridden from Checkbox:
-  virtual void SetChecked(bool checked) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(RadioButton);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_CONTROLS_BUTTON_RADIO_BUTTON_H_