It is time.

ui/views/controls/button/checkbox.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_CHECKBOX_H_
-#define UI_VIEWS_CONTROLS_BUTTON_CHECKBOX_H_
-
-#include <string>
-
-#include "base/compiler_specific.h"
-#include "base/strings/string16.h"
-#include "ui/views/controls/button/label_button.h"
-
-namespace views {
-
-// A native themed class representing a checkbox.  This class does not use
-// platform specific objects to replicate the native platforms looks and feel.
-class VIEWS_EXPORT Checkbox : public LabelButton {
- public:
-  static const char kViewClassName[];
-
-  explicit Checkbox(const base::string16& label);
-  virtual ~Checkbox();
-
-  // Sets a listener for this checkbox. Checkboxes aren't required to have them
-  // since their state can be read independently of them being toggled.
-  void set_listener(ButtonListener* listener) { listener_ = listener; }
-
-  // Sets/Gets whether or not the checkbox is checked.
-  virtual void SetChecked(bool checked);
-  bool checked() const { return checked_; }
-
- protected:
-  // Overridden from LabelButton:
-  virtual void Layout() override;
-  virtual const char* GetClassName() const override;
-  virtual void GetAccessibleState(ui::AXViewState* state) override;
-  virtual void OnFocus() override;
-  virtual void OnBlur() override;
-  virtual const gfx::ImageSkia& GetImage(ButtonState for_state) override;
-
-  // Set the image shown for each button state depending on whether it is
-  // [checked] or [focused].
-  void SetCustomImage(bool checked,
-                      bool focused,
-                      ButtonState for_state,
-                      const gfx::ImageSkia& image);
-
- private:
-  // Overridden from Button:
-  virtual void NotifyClick(const ui::Event& event) override;
-
-  virtual ui::NativeTheme::Part GetThemePart() const override;
-  virtual void GetExtraParams(
-      ui::NativeTheme::ExtraParams* params) const override;
-
-  // True if the checkbox is checked.
-  bool checked_;
-
-  // The images for each button state.
-  gfx::ImageSkia images_[2][2][STATE_COUNT];
-
-  DISALLOW_COPY_AND_ASSIGN(Checkbox);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_CONTROLS_BUTTON_CHECKBOX_H_