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diff --git a/chrome/views/controls/button/button_dropdown.h b/chrome/views/controls/button/button_dropdown.h
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+++ b/chrome/views/controls/button/button_dropdown.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_BUTTON_DROPDOWN_H_
+#define CHROME_VIEWS_CONTROLS_BUTTON_BUTTON_DROPDOWN_H_
+
+#include "base/task.h"
+#include "chrome/views/controls/button/image_button.h"
+#include "chrome/views/controls/menu/menu.h"
+
+namespace views {
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// ButtonDropDown
+//
+// A button class that when pressed (and held) or pressed (and drag down) will
+// display a menu
+//
+////////////////////////////////////////////////////////////////////////////////
+class ButtonDropDown : public ImageButton {
+ public:
+  ButtonDropDown(ButtonListener* listener, Menu::Delegate* menu_delegate);
+  virtual ~ButtonDropDown();
+
+  // Returns the MSAA default action of the current view. The string returned
+  // describes the default action that will occur when executing
+  // IAccessible::DoDefaultAction.
+  bool GetAccessibleDefaultAction(std::wstring* action);
+
+  // Returns the MSAA role of the current view. The role is what assistive
+  // technologies (ATs) use to determine what behavior to expect from a given
+  // control.
+  bool GetAccessibleRole(VARIANT* role);
+
+  // Returns the MSAA state of the current view. Sets the input VARIANT
+  // appropriately, and returns true if a change was performed successfully.
+  // Overriden from View.
+  virtual bool GetAccessibleState(VARIANT* state);
+
+ private:
+  // Overridden from Button
+  virtual bool OnMousePressed(const MouseEvent& e);
+  virtual void OnMouseReleased(const MouseEvent& e, bool canceled);
+  virtual bool OnMouseDragged(const MouseEvent& e);
+
+  // Overridden from View. Used to display the right-click menu, as triggered
+  // by the keyboard, for instance. Using the member function ShowDropDownMenu
+  // for the actual display.
+  virtual void ShowContextMenu(int x,
+                               int y,
+                               bool is_mouse_gesture);
+
+  // Internal function to show the dropdown menu
+  void ShowDropDownMenu(HWND window);
+
+  // Specifies who to delegate populating the menu
+  Menu::Delegate* menu_delegate_;
+
+  // Y position of mouse when left mouse button is pressed
+  int y_position_on_lbuttondown_;
+
+  // A factory for tasks that show the dropdown context menu for the button.
+  ScopedRunnableMethodFactory<ButtonDropDown> show_menu_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ButtonDropDown);
+};
+
+}  // namespace views
+
+#endif  // CHROME_VIEWS_CONTROLS_BUTTON_BUTTON_DROPDOWN_H_