Reduce unnecessary download interruptions due to parallel requests

content/browser/download/parallel_download_job.h

 // Copyright 2017 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_PARALLEL_DOWNLOAD_JOB_H_
 #define CONTENT_BROWSER_DOWNLOAD_PARALLEL_DOWNLOAD_JOB_H_
 
 #include <memory>
 #include <unordered_map>
 #include <vector>
@@ skipping 38 matching lines @@
   // slice.
   WorkerMap workers_;
 
  private:
   friend class ParallelDownloadJobTest;
 
   // DownloadWorker::Delegate implementation.
   void OnByteStreamReady(
       DownloadWorker* worker,
       std::unique_ptr<ByteStreamReader> stream_reader) override;
-  void OnServerResponseError(DownloadWorker* worker,
-                             DownloadInterruptReason reason) override;
 
   // Build parallel requests after a delay, to effectively measure the single
   // stream bandwidth.
   void BuildParallelRequestAfterDelay();
 
   // Build parallel requests to download. This function is the entry point for
   // all parallel downloads.
   void BuildParallelRequests();
 
   // Build one http request for each slice from the second slice.
@@ skipping 20 matching lines @@
 
   // If the download progress is canceled.
   bool is_canceled_;
 
   DISALLOW_COPY_AND_ASSIGN(ParallelDownloadJob);
 };
 
 }  //  namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_PARALLEL_DOWNLOAD_JOB_H_