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

content/browser/download/download_create_info.h

 // 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.
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_CREATE_INFO_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_CREATE_INFO_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 80 matching lines @@
   // for the download location.
   // False if the UI should be suppressed and the download performed to the
   // default location.
   bool prompt_user_for_save_location;
 
   // The charset of the referring page where the download request comes from.
   // It's used to construct a suggested filename.
   std::string referrer_charset;
 
   // The download file save info.
-  content::DownloadSaveInfo save_info;
+  scoped_ptr<content::DownloadSaveInfo> save_info;
 
   // The remote IP address where the download was fetched from.  Copied from
   // UrlRequest::GetSocketAddress().
   std::string remote_address;
 
   // The handle to the URLRequest sourcing this download.
   DownloadRequestHandle request_handle;
 
   // Default directory to use for this download. The final target path may not
   // be determined until much later. In the meantime, this directory (if
   // non-empty) should be used to store teh download file.
   // TODO(asanka,rdsmith): Get rid of this when we start creating the
   //                       DownloadFile on the UI thread.
   FilePath default_download_directory;
 
   // The request's |BoundNetLog|, for "source_dependency" linking with the
   // download item's.
   const net::BoundNetLog request_bound_net_log;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DownloadCreateInfo);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_CREATE_INFO_H_