Treat ERR_CONNECTION_CLOSED as a succesful download.

chrome/browser/download/download_manager.cc

Index: chrome/browser/download/download_manager.cc
diff --git a/chrome/browser/download/download_manager.cc b/chrome/browser/download/download_manager.cc
index 0ba403a8faa227d9373de462a92bdd5b076480f6..1988751dab8c03b12763ea357fba1e0b4d45f1e4 100644
--- a/chrome/browser/download/download_manager.cc
+++ b/chrome/browser/download/download_manager.cc
@@ -632,7 +632,12 @@ void DownloadManager::OnResponseCompleted(int32 download_id,
                                           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);