Fix an issue that we didn't clean url request properly.

content/browser/download/download_file_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_FILE_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_IMPL_H_
 
 #include "content/browser/download/download_file.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <unordered_map>
+#include <unordered_set>
 #include <vector>
 
 #include "base/files/file.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "content/browser/byte_stream.h"
@@ skipping 216 matching lines @@
   // used to initialize file_ on the FILE thread.
   std::unique_ptr<DownloadSaveInfo> save_info_;
 
   // The default directory for creating the download file.
   base::FilePath default_download_directory_;
 
   // Map of the offset and the source stream that represents the slice
   // starting from offset.
   SourceStreams source_streams_;
 
+  // The offsets of the streams to be closed. Since ByteStreamReader can't close
+  // resource writing to the pipe, we need to close them on UI thread.
+  std::unordered_set<int64_t> streams_to_close_;
+
   // Used to trigger progress updates.
   std::unique_ptr<base::RepeatingTimer> update_timer_;
 
   // Potential file length. A range request with an offset larger than this
   // value will fail. So the actual file length cannot be larger than this.
   int64_t potential_file_length_;
 
   // Statistics
   size_t bytes_seen_;
   base::TimeDelta disk_writes_time_;
@@ skipping 11 matching lines @@
 
   base::WeakPtr<DownloadDestinationObserver> observer_;
   base::WeakPtrFactory<DownloadFileImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_IMPL_H_