Use a real download item....

chrome/browser/cocoa/download_item_controller.h

Index: chrome/browser/cocoa/download_item_controller.h
===================================================================
--- chrome/browser/cocoa/download_item_controller.h	(revision 21145)
+++ chrome/browser/cocoa/download_item_controller.h	(working copy)
@@ -7,6 +7,7 @@
 #include "base/scoped_ptr.h"
 
 class BaseDownloadItemModel;
+@class DownloadItemCell;
 class DownloadItemMac;
 class DownloadShelfContextMenuMac;
 @class DownloadShelfController;
@@ -15,11 +16,14 @@
 
 @interface DownloadItemController : NSViewController {
  @private
-  IBOutlet NSPopUpButton* popupButton_;
+  IBOutlet NSButton* progressView_;
+  IBOutlet DownloadItemCell* cell_;
 
   IBOutlet NSMenu* activeDownloadMenu_;
   IBOutlet NSMenu* completeDownloadMenu_;
 
+  NSMenu* currentMenu_;  // points to one of the two menus above
+
   scoped_ptr<DownloadItemMac> bridge_;
   scoped_ptr<DownloadShelfContextMenuMac> menuBridge_;
 
@@ -38,6 +42,9 @@
 // Remove ourself from the download UI.
 - (void)remove;
 
+// Download item button clicked
+- (IBAction)handleButtonClick:(id)sender;
+
 // Context menu handlers.
 - (IBAction)handleOpen:(id)sender;
 - (IBAction)handleAlwaysOpen:(id)sender;