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

content/browser/download/download_file_impl.cc

Index: content/browser/download/download_file_impl.cc
diff --git a/content/browser/download/download_file_impl.cc b/content/browser/download/download_file_impl.cc
index 0efd0a2a36065c6f1a2f24285bda6d96c994a4a5..b94709c56f5a5a1db04668bbc348a0ca422939ee 100644
--- a/content/browser/download/download_file_impl.cc
+++ b/content/browser/download/download_file_impl.cc
@@ -29,25 +29,26 @@ const int kMaxTimeBlockingFileThreadMs = 1000;
 int DownloadFile::number_active_objects_ = 0;
 
 DownloadFileImpl::DownloadFileImpl(
-    scoped_ptr<DownloadSaveInfo> save_info,
+    const DownloadSaveInfo& save_info,
     const base::FilePath& default_download_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)
-        : file_(save_info->file_path,
+        : file_(save_info.file_path,
                 url,
                 referrer_url,
-                save_info->offset,
+                save_info.offset,
                 calculate_hash,
-                save_info->hash_state,
-                save_info->file_stream.Pass(),
+                save_info.hash_state,
+                file_stream.Pass(),
                 bound_net_log),
           default_download_directory_(default_download_directory),
-          stream_reader_(stream.Pass()),
+          stream_reader_(byte_stream.Pass()),
           bytes_seen_(0),
           bound_net_log_(bound_net_log),
           observer_(observer),