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

content/public/browser/download_save_info.h

Index: content/public/browser/download_save_info.h
diff --git a/content/public/browser/download_save_info.h b/content/public/browser/download_save_info.h
index e955f1d03d5f448c029b064c62beb461be8fa48e..cfa7c01d59c1e665cae76fe9e516014c9bf78b17 100644
--- a/content/public/browser/download_save_info.h
+++ b/content/public/browser/download_save_info.h
@@ -30,7 +30,7 @@ struct CONTENT_EXPORT DownloadSaveInfo {
   string16 suggested_name;
 
   // If non-NULL, contains the source data stream for the file contents.
-  linked_ptr<net::FileStream> file_stream;
+  scoped_ptr<net::FileStream> file_stream;
 
   // The file offset at which to start the download.  May be 0.
   int64 offset;
@@ -44,6 +44,9 @@ struct CONTENT_EXPORT DownloadSaveInfo {
   // basis if |file_path| is not empty.
   // |prompt_for_save_location| defaults to false.
   bool prompt_for_save_location;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DownloadSaveInfo);
 };
 
 }  // namespace content