Reduce unnecessary download interruptions due to parallel requests

content/browser/download/download_file_impl.cc

 // 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.
 
 #include "content/browser/download/download_file_impl.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 423 matching lines @@
               AddNewSlice(source_stream->offset(), bytes_to_write);
             } else {
               received_slices_[source_stream->index()].received_bytes +=
                   bytes_to_write;
             }
           }
         }
         break;
       case ByteStreamReader::STREAM_COMPLETE:
         {
-          reason = static_cast<DownloadInterruptReason>(
+        reason = static_cast<DownloadInterruptReason>(
             source_stream->stream_reader()->GetStatus());
-          SendUpdate();
+        if (source_stream->length() == DownloadSaveInfo::kLengthFullContent &&
+            !received_slices_.empty() &&
+            (source_stream->offset() == received_slices_.back().offset +
+                received_slices_.back().received_bytes) &&
+            reason == DownloadInterruptReason::
+                          DOWNLOAD_INTERRUPT_REASON_SERVER_NO_RANGE) {
+          // We are probably reaching the end of the stream, don't treat this
+          // as an error.
+          reason = DOWNLOAD_INTERRUPT_REASON_NONE;
+        }
+        SendUpdate();
         }
         break;
       default:
         NOTREACHED();
         break;
     }
     now = base::TimeTicks::Now();
   } while (state == ByteStreamReader::STREAM_HAS_DATA &&
            reason == DOWNLOAD_INTERRUPT_REASON_NONE && now - start <= delta &&
            !should_terminate);
@@ skipping 259 matching lines @@
     const base::FilePath& new_path,
     const RenameCompletionCallback& completion_callback)
     : option(option),
       new_path(new_path),
       retries_left(kMaxRenameRetries),
       completion_callback(completion_callback) {}
 
 DownloadFileImpl::RenameParameters::~RenameParameters() {}
 
 }  // namespace content