Propagate server response error and interrupt the download.

content/browser/download/download_job.cc

 // 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.
 
 #include "content/browser/download/download_job.h"
 
 #include "content/browser/download/download_item_impl.h"
 
 namespace content {
 
 DownloadJob::DownloadJob(DownloadItemImpl* download_item)
     : download_item_(download_item), is_paused_(false) {}
 
 DownloadJob::~DownloadJob() = default;
 
 void DownloadJob::Pause() {
   is_paused_ = true;
 }
 
 void DownloadJob::Resume(bool resume_request) {
   is_paused_ = false;
 }
 
 void DownloadJob::StartDownload() const {
   download_item_->StartDownload();
 }
 
+void DownloadJob::Interrupt(DownloadInterruptReason reason) {
+  download_item_->InterruptAndDiscardPartialState(reason);

[qinmin, 2017/03/17 05:09:46]

This doesn't update the download_item_'s observers.

[xingliu, 2017/03/17 21:14:36]

Done, thanks for this suggestion.

+}
+
 }  // namespace content