Propagate server response error and interrupt the download.

content/browser/download/parallel_download_job.h

Index: content/browser/download/parallel_download_job.h
diff --git a/content/browser/download/parallel_download_job.h b/content/browser/download/parallel_download_job.h
index 8d02a7984fb2992982c724f9be56fb6586b11d17..2d1f550b5b5a5a74e8c8bd015a006c5e31907c0d 100644
--- a/content/browser/download/parallel_download_job.h
+++ b/content/browser/download/parallel_download_job.h
@@ -18,7 +18,8 @@ namespace content {
 // DownloadJob that can create concurrent range requests to fetch different
 // parts of the file.
 // The original request is hold in base class DownloadUrlJob.
-class CONTENT_EXPORT ParallelDownloadJob : public DownloadJobImpl {
+class CONTENT_EXPORT ParallelDownloadJob : public DownloadJobImpl,
+                                           public DownloadWorker::Delegate {
  public:
   ParallelDownloadJob(
       DownloadItemImpl* download_item,
@@ -37,6 +38,10 @@ class CONTENT_EXPORT ParallelDownloadJob : public DownloadJobImpl {
 
   typedef std::vector<std::unique_ptr<DownloadWorker>> WorkerList;
 
+  // DownloadWorker::Delegate implementation.
+  void OnServerResponseError(DownloadWorker* worker,
+                             DownloadInterruptReason reason) override;
+
   // Build multiple http requests for a new download,
   // the rest of the bytes starting from |bytes_received| will be equally
   // distributed to each connection, including the original connection.