Support dragging a virtual file out of the browser.

chrome/browser/gtk/download_item_gtk.h

 // Copyright (c) 2009 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.
 
 #ifndef CHROME_BROWSER_GTK_DOWNLOAD_ITEM_GTK_H_
 #define CHROME_BROWSER_GTK_DOWNLOAD_ITEM_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include <string>
@@ skipping 21 matching lines @@
  public:
   // DownloadItemGtk takes ownership of |download_item_model|.
   DownloadItemGtk(DownloadShelfGtk* parent_shelf,
                   BaseDownloadItemModel* download_item_model);
 
   // Destroys all widgets belonging to this DownloadItemGtk.
   ~DownloadItemGtk();
 
   // DownloadItem::Observer implementation.
   virtual void OnDownloadUpdated(DownloadItem* download);
+  virtual void OnDownloadFileCompleted(DownloadItem* download) { }
   virtual void OnDownloadOpened(DownloadItem* download) { }
 
   // AnimationDelegate implementation.
   virtual void AnimationProgressed(const Animation* animation);
 
   // Overridden from NotificationObserver:
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
@@ skipping 164 matching lines @@
   NotificationRegistrar registrar_;
 
   // The time at which we were insantiated.
   base::Time creation_time_;
 
   // For canceling an in progress icon request.
   CancelableRequestConsumerT<int, 0> icon_consumer_;
 };
 
 #endif  // CHROME_BROWSER_GTK_DOWNLOAD_ITEM_GTK_H_