Support dragging a virtual file out of the browser.

chrome/browser/cocoa/download_item_mac.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_COCOA_DOWNLOAD_ITEM_MAC_H_
 #define CHROME_BROWSER_COCOA_DOWNLOAD_ITEM_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/scoped_nsobject.h"
@@ skipping 13 matching lines @@
  public:
   // DownloadItemMac takes ownership of |download_model|.
   DownloadItemMac(BaseDownloadItemModel* download_model,
                   DownloadItemController* controller);
 
   // Destructor.
   ~DownloadItemMac();
 
   // DownloadItem::Observer implementation
   virtual void OnDownloadUpdated(DownloadItem* download);
+  virtual void OnDownloadFileCompleted(DownloadItem* download) { }
   virtual void OnDownloadOpened(DownloadItem* download) { }
 
   BaseDownloadItemModel* download_model() { return download_model_.get(); }
 
   // Asynchronous icon loading support.
   void LoadIcon();
 
  private:
   // Callback for asynchronous icon loading.
   void OnExtractIconComplete(IconManager::Handle handle, SkBitmap* icon_bitmap);
 
   // The download item model we represent.
   scoped_ptr<BaseDownloadItemModel> download_model_;
 
   // The objective-c controller object.
   DownloadItemController* item_controller_;  // weak, owns us.
 
   // For canceling an in progress icon request.
   CancelableRequestConsumerT<int, 0> icon_consumer_;
 
   // Stores the last known name where the file will be saved.
   FilePath lastFilePath_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemMac);
 };
 
 #endif  // CHROME_BROWSER_COCOA_DOWNLOAD_ITEM_MAC_H_