Make DownloadFileImpl handle multiple byte streams.

content/browser/download/download_file_factory.cc

Index: content/browser/download/download_file_factory.cc
diff --git a/content/browser/download/download_file_factory.cc b/content/browser/download/download_file_factory.cc
index a2afc680a97dd2f1e3663b1a77451e7b3c98b8d5..e1811a98524a0ab2ad7905dd9c100b532236c207 100644
--- a/content/browser/download/download_file_factory.cc
+++ b/content/browser/download/download_file_factory.cc
@@ -18,11 +18,8 @@ DownloadFile* DownloadFileFactory::CreateFile(
     std::unique_ptr<ByteStreamReader> byte_stream,
     const net::NetLogWithSource& net_log,
     base::WeakPtr<DownloadDestinationObserver> observer) {
-  return new DownloadFileImpl(std::move(save_info),
-                              default_downloads_directory,
-                              std::move(byte_stream),
-                              net_log,
-                              observer);
+  return new DownloadFileImpl(std::move(save_info), default_downloads_directory,
+                              std::move(byte_stream), net_log, false, observer);
 }
 
 }  // namespace content