Pump the http version to download system.

content/browser/download/download_create_info.h

Index: content/browser/download/download_create_info.h
diff --git a/content/browser/download/download_create_info.h b/content/browser/download/download_create_info.h
index a69f4bace435560758b777dc07e361a02156aee1..29f5256f13774ae0996deba395ab866457afa365 100644
--- a/content/browser/download/download_create_info.h
+++ b/content/browser/download/download_create_info.h
@@ -19,6 +19,7 @@
 #include "content/common/content_export.h"
 #include "content/public/browser/download_interrupt_reasons.h"
 #include "content/public/browser/download_save_info.h"
+#include "net/http/http_response_info.h"
 #include "net/log/net_log_with_source.h"
 #include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
@@ -120,6 +121,9 @@ struct CONTENT_EXPORT DownloadCreateInfo {
   // If "Accept-Ranges:bytes" header presents in the response header.
   bool accept_range;
 
+  // The HTTP connection type.
+  net::HttpResponseInfo::ConnectionInfo connection_info;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(DownloadCreateInfo);
 };