Treat ERR_CONNECTION_CLOSED as end-of-data marker for downloads.

chrome/browser/download/download_item.cc

Index: chrome/browser/download/download_item.cc
diff --git a/chrome/browser/download/download_item.cc b/chrome/browser/download/download_item.cc
index 59126a86d43769586c96fbf06678a0fd2ce9b69c..552ab7132dc80537002d1710915c3785c0736c92 100644
--- a/chrome/browser/download/download_item.cc
+++ b/chrome/browser/download/download_item.cc
@@ -629,6 +629,7 @@ std::string DownloadItem::DebugString(bool verbose) const {
     description += base::StringPrintf(
         " db_handle = %" PRId64
         " total_bytes = %" PRId64
+        " received_bytes = %" PRId64
         " is_paused = " "%c"
         " is_extension_install = " "%c"
         " is_otr = " "%c"
@@ -638,6 +639,7 @@ std::string DownloadItem::DebugString(bool verbose) const {
         " full_path = \"%" PRFilePath "\"",
         db_handle(),
         total_bytes(),
+        received_bytes(),
         is_paused() ? 'T' : 'F',
         is_extension_install() ? 'T' : 'F',
         is_otr() ? 'T' : 'F',