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diff --git a/chrome/views/controls/button/radio_button.h b/chrome/views/controls/button/radio_button.h
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+++ b/chrome/views/controls/button/radio_button.h
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+// Copyright (c) 2006-2008 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_VIEWS_CONTROLS_BUTTON_RADIO_BUTTON_H_
+#define CHROME_VIEWS_CONTROLS_BUTTON_RADIO_BUTTON_H_
+
+#include "chrome/views/controls/button/checkbox.h"
+
+namespace views {
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// A wrapper for windows's native radio button. Radio buttons can be mutually
+// exclusive with other radio buttons.
+//
+////////////////////////////////////////////////////////////////////////////////
+class RadioButton : public CheckBox {
+ public:
+  // The view class name.
+  static const char kViewClassName[];
+
+  // Create a radio button with the provided label and group id.
+  // The group id is used to identify all the other radio buttons which are in
+  // mutual exclusion with this radio button. Note: RadioButton assumes that
+  // all views with that group id are RadioButton. It is an error to give
+  // that group id to another view subclass which is not a radio button or
+  // a radio button subclass.
+  RadioButton(const std::wstring& label, int group_id);
+  virtual ~RadioButton();
+
+  virtual gfx::Size GetPreferredSize();
+  virtual void Layout();
+
+  virtual std::string GetClassName() const;
+
+  // Overridden to properly perform mutual exclusion.
+  virtual void SetIsSelected(bool f);
+
+  virtual View* GetSelectedViewForGroup(int group_id);
+
+  // When focusing a RadioButton with Tab/Shift-Tab, only the selected button
+  // from the group should be accessible.
+  virtual bool IsGroupFocusTraversable() const { return false; }
+
+ protected:
+  virtual HWND CreateNativeControl(HWND parent_container);
+  virtual LRESULT OnCommand(UINT code, int id, HWND source);
+
+ private:
+  // Get the horizontal distance of the start of the text from the left of the
+  // control.
+  static int GetTextIndent();
+
+  DISALLOW_EVIL_CONSTRUCTORS(RadioButton);
+};
+
+}  // namespace views
+
+#endif  // CHROME_VIEWS_CONTROLS_BUTTON_RADIO_BUTTON_H_