interrupt and resume download with CONTENT_LENGTH_MISMATCH errors

content/browser/download/download_item_impl.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_ITEM_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 695 matching lines @@
   std::string etag_;
 
   // The data slices that have been received so far.
   std::vector<DownloadItem::ReceivedSlice> received_slices_;
 
   // Net log to use for this download.
   const net::NetLogWithSource net_log_;
 
   std::unique_ptr<DownloadJob> job_;
 
+  // Value of |received_bytes_| at the time the download was interrupted with
+  // CONTENT_LENGTH_MISMATCH.
+  int64_t received_bytes_at_length_mismatch = -1;
+
   base::WeakPtrFactory<DownloadItemImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_H_