Display action box menu on Linux/gtk.

chrome/browser/ui/gtk/action_box_button_gtk.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 CHROME_BROWSER_UI_GTK_ACTION_BOX_BUTTON_GTK_H_
 #define CHROME_BROWSER_UI_GTK_ACTION_BOX_BUTTON_GTK_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
+#include "chrome/browser/ui/gtk/menu_gtk.h"
 #include "ui/base/gtk/gtk_signal.h"
 
+class ActionBoxMenuModel;
 class Browser;
 class CustomDrawButton;
 
 typedef struct _GtkWidget GtkWidget;
 
 // This class displays the action box button with an associated menu. This is
 // where extension actions and the bookmark star live.
-class ActionBoxButtonGtk {
+class ActionBoxButtonGtk : public MenuGtk::Delegate {
  public:
   explicit ActionBoxButtonGtk(Browser* browser);
   virtual ~ActionBoxButtonGtk();
 
+  // MenuGtk::Delegate implementation.
+  virtual bool AlwaysShowIconForCmd(int command_id) const OVERRIDE;
+
   GtkWidget* widget();
 
  private:
-  // Executes the browser command.
-  CHROMEGTK_CALLBACK_0(ActionBoxButtonGtk, void, OnClick);
+  // Show the action box menu.
+  CHROMEGTK_CALLBACK_1(ActionBoxButtonGtk, gboolean, OnButtonPress,
+                       GdkEventButton*);
 
   scoped_ptr<CustomDrawButton> button_;
 
   // The browser to which we will send commands.
   Browser* browser_;
 
+  // The model and menu displayed when the button is clicked. The menu is
+  // recreated every time it is displayed.
+  scoped_ptr<ActionBoxMenuModel> model_;
+  scoped_ptr<MenuGtk> menu_;
+
   DISALLOW_COPY_AND_ASSIGN(ActionBoxButtonGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_ACTION_BOX_BUTTON_GTK_H_