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

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 a7fe7b834a9933d3becdad72bf7339917c8f4254..ee7883d842583dd0c61b76a881982113abccba5b 100644
--- a/content/browser/download/download_file_factory.cc
+++ b/content/browser/download/download_file_factory.cc
@@ -12,12 +12,13 @@ namespace content {
 DownloadFileFactory::~DownloadFileFactory() {}
 
 DownloadFile* DownloadFileFactory::CreateFile(
-    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,
     base::WeakPtr<DownloadDestinationObserver> observer) {
   scoped_ptr<PowerSaveBlocker> psb(
@@ -25,8 +26,8 @@ DownloadFile* DownloadFileFactory::CreateFile(
           PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension,
           "Download in progress"));
   return new DownloadFileImpl(
-      save_info.Pass(), default_downloads_directory, url, referrer_url,
-      calculate_hash, stream.Pass(), bound_net_log,
+      save_info, default_downloads_directory, url, referrer_url,
+      calculate_hash, file_stream.Pass(), byte_stream.Pass(), bound_net_log,
       psb.Pass(), observer);
 }