Treat ERR_CONNECTION_CLOSED as a succesful download.

chrome/browser/download/download_manager.cc

 // Copyright (c) 2011 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 "chrome/browser/download/download_manager.h"
 
 #include "base/callback.h"
 #include "base/file_util.h"
 #include "base/i18n/case_conversion.h"
 #include "base/logging.h"
@@ skipping 614 matching lines @@
       download_history_->UpdateEntry(download);
     }
   }
 }
 
 void DownloadManager::OnResponseCompleted(int32 download_id,
                                           int64 size,
                                           int os_error,
                                           const std::string& hash) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  if (os_error == 0) {
+  // ERR_CONNECTION_CLOSED is allowed since a number of servers in the wild
+  // advertise a larger Content-Length than the amount of bytes in the message
+  // body, and then close the connection. Other browsers - IE8, Firefox 4.0.1,
+  // and Safari 5.0.4 - treat the download as complete in this case, so we
+  // follow their lead.
+  if (os_error == 0 || os_error == net::ERR_CONNECTION_CLOSED) {
     OnAllDataSaved(download_id, size, hash);
   } else {
     OnDownloadError(download_id, size, os_error);
   }
 }
 
 void DownloadManager::OnAllDataSaved(int32 download_id,
                                      int64 size,
                                      const std::string& hash) {
   VLOG(20) << __FUNCTION__ << "()" << " download_id = " << download_id
@@ skipping 658 matching lines @@
     observed_download_manager_->RemoveObserver(this);
 }
 
 void DownloadManager::OtherDownloadManagerObserver::ModelChanged() {
   observing_download_manager_->NotifyModelChanged();
 }
 
 void DownloadManager::OtherDownloadManagerObserver::ManagerGoingDown() {
   observed_download_manager_ = NULL;
 }