[Mac] Refactor for updating the download item

chrome/browser/ui/cocoa/download/download_item_controller.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.
 
 #import <Cocoa/Cocoa.h>
 
 #include <memory>
 
 #include "base/time/time.h"
 
@@ skipping 137 matching lines @@
 - (content::DownloadItem*)download;
 
 // Returns the MenuModel for the download item context menu. The returned
 // MenuModel is owned by the DownloadItemController and will be valid until the
 // DownloadItemController is destroyed.
 - (ui::MenuModel*)contextMenuModel;
 
 // Updates the tooltip with the download's path.
 - (void)updateToolTip;
 
-// Updates |progressView_| by calling setNeedsDisplay:YES.
-- (void)updateDownloadItemView;
-
 // Handling of dangerous downloads
 - (void)clearDangerousMode;
 - (BOOL)isDangerousMode;
 - (IBAction)saveDownload:(id)sender;
 - (IBAction)discardDownload:(id)sender;
 - (IBAction)showContextMenu:(id)sender;
 
 @end