Replace the DownloadFileManager with direct ownership

content/browser/download/download_file_factory.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+#ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_FACTORY_H_
+#define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_FACTORY_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
+#include "googleurl/src/gurl.h"
+
+namespace net {
+class BoundNetLog;
+}
+
+namespace content {
+
+struct DownloadSaveInfo;
+
+class ByteStreamReader;
+class DownloadDestinationController;
+class DownloadFile;
+class DownloadManager;
+
+class CONTENT_EXPORT DownloadFileFactory {
+ public:
+  virtual ~DownloadFileFactory();
+
+  virtual content::DownloadFile* CreateFile(
+    const content::DownloadSaveInfo& save_info,
+    GURL url,
+    GURL referrer_url,
+    int64 received_bytes,
+    bool calculate_hash,
+    scoped_ptr<content::ByteStreamReader> stream,
+    const net::BoundNetLog& bound_net_log,
+    base::WeakPtr<content::DownloadDestinationController> controller);
+};
+
+};  // namespace content
+
+#endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_FACTORY_H_