[Resumption 6/11] Add a RESUMING_INTERNAL state to DownloadItem.

content/browser/download/download_resource_handler.cc

Index: content/browser/download/download_resource_handler.cc
diff --git a/content/browser/download/download_resource_handler.cc b/content/browser/download/download_resource_handler.cc
index 388bcd1e5a9a2853f21adef2a372f92cbae8dce5..35c6b242d32e7c12e83356613bc52fa83be0b64c 100644
--- a/content/browser/download/download_resource_handler.cc
+++ b/content/browser/download/download_resource_handler.cc
@@ -65,8 +65,9 @@ static void StartOnUIThread(
   DownloadItem* item = download_manager->StartDownload(
       info.Pass(), stream.Pass());
 
+  // |item| can be NULL if the download has been removed.
   if (!started_cb.is_null())
-    started_cb.Run(item, net::OK);
+    started_cb.Run(item, item ? net::OK : net::ERR_ABORTED);
 }
 
 }  // namespace