Shift "commit point" for when a download will no longer accept cancels.

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 "content/browser/download/download_create_info.h"
+#include "googleurl/src/gurl.h"
+
+namespace net {
+class BoundNetLog;
+}
+
+namespace content {
+
+struct DownloadSaveInfo;
+
+class ByteStreamReader;
+class DownloadDestinationObserver;
+class DownloadFile;
+class DownloadManager;
+
+class CONTENT_EXPORT DownloadFileFactory {
+ public:
+  virtual ~DownloadFileFactory();
+
+  virtual content::DownloadFile* CreateFile(
+      DownloadCreateInfo* info,
+      scoped_ptr<content::ByteStreamReader> stream,
+      DownloadManager* download_manager,
+      bool calculate_hash,
+      const net::BoundNetLog& bound_net_log);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_FACTORY_H_