Shift passage of FileStream in downloads system to be by scoped_ptr<>.

content/browser/web_contents/web_contents_drag_win.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 "content/browser/web_contents/web_contents_drag_win.h"
 
 #include <windows.h>
 
 #include <string>
 
@@ skipping 232 matching lines @@
   FilePath generated_download_file_name =
       net::GenerateFileName(download_url,
                             std::string(),
                             std::string(),
                             UTF16ToUTF8(file_name.value()),
                             UTF16ToUTF8(mime_type),
                             default_name);
 
   // Provide the data as file (CF_HDROP). A temporary download file with the
   // Zone.Identifier ADS (Alternate Data Stream) attached will be created.
-  linked_ptr<net::FileStream> empty_file_stream;
   scoped_refptr<DragDownloadFile> download_file =
       new DragDownloadFile(
           generated_download_file_name,
-          empty_file_stream,
+          scoped_ptr<net::FileStream>(),
           download_url,
           content::Referrer(page_url, drop_data.referrer_policy),
           page_encoding,
           web_contents_);
   ui::OSExchangeData::DownloadFileInfo file_download(FilePath(),
                                                      download_file.get());
   data->SetDownloadFileInfo(file_download);
 
   // Enable asynchronous operation.
   ui::OSExchangeDataProviderWin::GetIAsyncOperation(*data)->SetAsyncMode(TRUE);
@@ skipping 147 matching lines @@
 void WebContentsDragWin::OnDataObjectDisposed() {
   DCHECK(drag_drop_thread_id_ == base::PlatformThread::CurrentId());
 
   // The drag-and-drop thread is only closed after OLE is done with
   // DataObjectImpl.
   BrowserThread::PostTask(
       BrowserThread::UI,
       FROM_HERE,
       base::Bind(&WebContentsDragWin::CloseThread, this));
 }