No need to pass DownloadItemModel ownership.

chrome/browser/ui/views/download/download_shelf_view.cc

 // 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.
 
 #include "chrome/browser/ui/views/download/download_shelf_view.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 102 matching lines @@
   DCHECK(view);
   download_views_.push_back(view);
   AddChildView(view);
   if (download_views_.size() > kMaxDownloadViews)
     RemoveDownloadView(*download_views_.begin());
 
   new_item_animation_->Reset();
   new_item_animation_->Show();
 }
 
-void DownloadShelfView::DoAddDownload(DownloadItemModel* download_model) {
-  DownloadItemView* view = new DownloadItemView(
-      download_model->download(), this, download_model);
+void DownloadShelfView::DoAddDownload(DownloadItem* download) {
+  DownloadItemView* view = new DownloadItemView(download, this);
   AddDownloadView(view);
 }
 
 void DownloadShelfView::MouseMovedOutOfHost() {
   Close();
 }
 
 void DownloadShelfView::OnWillChangeFocus(views::View* focused_before,
                                           views::View* focused_now) {
   SchedulePaintForDownloadItem(focused_before);
@@ skipping 338 matching lines @@
     const DownloadItemView* download_item_view) {
   gfx::Rect bounds = download_item_view->bounds();
 
 #if defined(TOOLKIT_VIEWS)
   bounds.set_height(bounds.height() - 1);
   bounds.Offset(0, 3);
 #endif
 
   return bounds;
 }