Propagate the remote socket address to URLRequest and to ViewHostMsg_FrameNavigate.

net/ftp/ftp_response_info.h

Index: net/ftp/ftp_response_info.h
diff --git a/net/ftp/ftp_response_info.h b/net/ftp/ftp_response_info.h
index 0c8884c6e78c0dda06222892a11db5917fd79fda..1b3eede626c7b16d8fe919722013ec840c250309 100644
--- a/net/ftp/ftp_response_info.h
+++ b/net/ftp/ftp_response_info.h
@@ -6,6 +6,8 @@
 #define NET_FTP_FTP_RESPONSE_INFO_H_
 #pragma once
 
+#include <string>
+
 #include "base/time.h"
 
 namespace net {
@@ -36,6 +38,10 @@ class FtpResponseInfo {
 
   // True if the response data is of a directory listing.
   bool is_directory_listing;
+
+  // Remote address of the socket which fetched this resource, for presenting
+  // to inquisitive users.  Can be "ipv4:port", "[ipv6]:port", or empty.
+  std::string socket_address;
 };
 
 }  // namespace net