[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 e8e31cee7be9947d4ef043f7be2bd0ffa38587be..b8d876155d3821f47e1aba267005659ffb683779 100644
--- a/content/browser/download/download_file_impl.cc
+++ b/content/browser/download/download_file_impl.cc
@@ -35,21 +35,22 @@ const int kInitialRenameRetryDelayMs = 200;
 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,
+    base::File file,
     scoped_ptr<ByteStreamReader> stream,
     const net::BoundNetLog& bound_net_log,
     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,
-            std::move(save_info->file),
+            save_info.hash_state,
+            std::move(file),
             bound_net_log),
       default_download_directory_(default_download_directory),
       stream_reader_(std::move(stream)),