No need to pass DownloadItemModel ownership.

chrome/browser/ui/views/download/download_item_view.h

Index: chrome/browser/ui/views/download/download_item_view.h
diff --git a/chrome/browser/ui/views/download/download_item_view.h b/chrome/browser/ui/views/download/download_item_view.h
index e454ce7f9dc83c874fdf1ad76ef97caeeb6494bb..b14dddcbc1dbc0546bf47a9e54f69e8d2f2445d2 100644
--- a/chrome/browser/ui/views/download/download_item_view.h
+++ b/chrome/browser/ui/views/download/download_item_view.h
@@ -25,6 +25,7 @@
 #include "base/time.h"
 #include "base/timer.h"
 #include "chrome/browser/common/cancelable_request.h"
+#include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/icon_manager.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/download_manager.h"
@@ -34,7 +35,6 @@
 #include "ui/views/controls/button/button.h"
 #include "ui/views/view.h"
 
-class DownloadItemModel;
 class DownloadShelfView;
 class DownloadShelfContextMenuView;
 
@@ -59,8 +59,7 @@ class DownloadItemView : public views::ButtonListener,
                          public ui::AnimationDelegate {
  public:
   DownloadItemView(content::DownloadItem* download,
-                   DownloadShelfView* parent,
-                   DownloadItemModel* model);
+                   DownloadShelfView* parent);
   virtual ~DownloadItemView();
 
   // Timer callback for handling animations
@@ -72,7 +71,7 @@ class DownloadItemView : public views::ButtonListener,
   void OnExtractIconComplete(gfx::Image* icon);
 
   // Returns the DownloadItem model object belonging to this item.
-  content::DownloadItem* download() const { return download_; }
+  content::DownloadItem* download() { return model_.download(); }
 
   // DownloadItem::Observer methods
   virtual void OnDownloadUpdated(content::DownloadItem* download) OVERRIDE;
@@ -233,9 +232,6 @@ class DownloadItemView : public views::ButtonListener,
   // The warning icon showns for dangerous downloads.
   const gfx::ImageSkia* warning_icon_;
 
-  // The model we query for display information
-  content::DownloadItem* download_;
-
   // The download shelf that owns us.
   DownloadShelfView* shelf_;
 
@@ -283,10 +279,8 @@ class DownloadItemView : public views::ButtonListener,
   // For canceling an in progress icon request.
   CancelableTaskTracker cancelable_task_tracker_;
 
-  // A model class to control the status text we display and the cancel
-  // behavior.
-  // This class owns the pointer.
-  scoped_ptr<DownloadItemModel> model_;
+  // A model class to control the status text we display.
+  DownloadItemModel model_;
 
   // Hover animations for our body and drop buttons.
   scoped_ptr<ui::SlideAnimation> body_hover_animation_;