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 54165a9fcd78251bed8fcac151a89cb5a6b6a99f..4a9283b290e8311c2372fb19c5642a9cf8a63af6 100644
--- a/chrome/browser/download/download_item.cc
+++ b/chrome/browser/download/download_item.cc
@@ -659,6 +659,7 @@ 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"
@@ -668,6 +669,7 @@ 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',