[Downloads] Always call DM::StartDownload() for explicit downloads.

content/browser/download/download_file_impl.h

Index: content/browser/download/download_file_impl.h
diff --git a/content/browser/download/download_file_impl.h b/content/browser/download/download_file_impl.h
index 9a50870fb2a0f2286db1d84f94b6abc62e948459..46d3731f5c1139a5e42b0b2c15664d93932fcc34 100644
--- a/content/browser/download/download_file_impl.h
+++ b/content/browser/download/download_file_impl.h
@@ -36,12 +36,13 @@ class CONTENT_EXPORT DownloadFileImpl : virtual public DownloadFile {
   // stream, and sends updates and status of those reads to the
   // DownloadDestinationObserver.
   DownloadFileImpl(
-    scoped_ptr<DownloadSaveInfo> save_info,
+    const DownloadSaveInfo& save_info,
     const base::FilePath& default_downloads_directory,
     const GURL& url,
     const GURL& referrer_url,
     bool calculate_hash,
-    scoped_ptr<ByteStreamReader> stream,
+    scoped_ptr<net::FileStream> file_stream,
+    scoped_ptr<ByteStreamReader> byte_stream,
     const net::BoundNetLog& bound_net_log,
     scoped_ptr<PowerSaveBlocker> power_save_blocker,
     base::WeakPtr<DownloadDestinationObserver> observer);