[Mac] Refactor for updating the download item

chrome/browser/ui/cocoa/download/download_item_controller.mm

 // Copyright 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 "chrome/browser/ui/cocoa/download/download_item_controller.h"
 
 #include "base/mac/bundle_locations.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
@@ skipping 266 matching lines @@
 - (ui::MenuModel*)contextMenuModel {
   return menuBridge_->GetMenuModel();
 }
 
 - (void)updateToolTip {
   base::string16 tooltip_text =
       bridge_->download_model()->GetTooltipText(*font_list_, kToolTipMaxWidth);
   [progressView_ setToolTip:base::SysUTF16ToNSString(tooltip_text)];
 }
 
-- (void)updateDownloadItemView {
-  [progressView_ setNeedsDisplay:YES];
-}
-
 - (void)clearDangerousMode {
   [self setState:kNormal];
   // The state change hide the dangerouse download view and is now showing the
   // download progress view.  This means the view is likely to be a different
   // size, so trigger a shelf layout to fix up spacing.
   [shelf_ layoutItems];
 }
 
 - (BOOL)isDangerousMode {
   return state_ == kDangerous;
@@ skipping 63 matching lines @@
   DownloadItem* download = bridge_->download_model()->download();
   download->Remove();
   // WARNING: we are deleted at this point.  Don't access 'this'.
 }
 
 - (IBAction)showContextMenu:(id)sender {
   [progressView_ showContextMenu];
 }
 
 @end