Polish the cleaning up url request code for parallel download.

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>
@@ skipping 213 matching lines @@
                          DownloadInterruptReason reason);
 
   // Check whether this file is potentially sparse.
   bool IsSparseFile() const;
 
   // Given a SourceStream object, returns its neighbor that preceds it if
   // SourceStreams are ordered by their offsets
   SourceStream* FindPrecedingNeighbor(SourceStream* source_stream);
 
   // See |cancel_request_callback_|.
-  void CancelRequestOnUIThread(int64_t offset);
+  void CancelRequest(int64_t offset);
 
   // Print the internal states for debugging.
   void DebugStates() const;
 
   net::NetLogWithSource net_log_;
 
   // The base file instance.
   BaseFile file_;
 
   // DownloadSaveInfo provided during construction. Since the DownloadFileImpl
@@ skipping 36 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_