Put the dropdown menu button on the linux download shelf....

chrome/browser/gtk/download_shelf_gtk.h

 // Copyright (c) 2009 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_VIEWS_DOWNLOAD_SHELF_VIEW_H_
 #define CHROME_BROWSER_VIEWS_DOWNLOAD_SHELF_VIEW_H_
 
 #include <gtk/gtk.h>
 
 #include <vector>
@@ skipping 16 matching lines @@
  private:
   // Show the shelf.
   void Show();
 
   // Hide the shelf.
   void Hide();
 
   static void OnCloseButtonClick(GtkWidget* button,
                                  DownloadShelfGtk* toolbar);
 
-  // |bar_| is the highest level widget of the download shelf. It is an hbox.
+  // |hbox_| holds the download items and buttons of the shelf.
+  GtkWidget* hbox_;
+
+  // |shelf_box_| is the highest level widget of the shelf. It has a single
+  // child, |hbox_|. It exists because we need to be able to set the background
+  // color of the shelf, and GtkBoxes don't have a gdk window, which is a
+  // requisite for changing the background color.
   GtkWidget* shelf_;

[Dean McNamee, 2009/03/05 14:16:01]

shelf_box_ -> shelf_ ?

 
   // The 'x' that the user can press to hide the download shelf.
   scoped_ptr<CustomDrawButton> close_button_;
 
   // Keeps track of our current hide/show state.
   bool is_showing_;
 
   // The download items we have added to our shelf.
   std::vector<DownloadItemGtk*> download_items_;
 };
 
 #endif  // CHROME_BROWSER_VIEWS_DOWNLOAD_SHELF_VIEW_H_