Really connect to the same server in FTP network transaction.

net/base/address_list.h

Index: net/base/address_list.h
diff --git a/net/base/address_list.h b/net/base/address_list.h
index 3087472e55be57c94e138fc3949795b7057d20c0..b477987df6189037c35f9a2fd4e1f8f583e79539 100644
--- a/net/base/address_list.h
+++ b/net/base/address_list.h
@@ -23,8 +23,14 @@ class AddressList {
   // object.
   void Adopt(struct addrinfo* head);
 
-  // Copies the given addrinfo rather than adopting it.
-  void Copy(const struct addrinfo* head);
+  // Copies the given addrinfo rather than adopting it. If |recursive| is true,
+  // all linked struct addrinfos will be copied as well. Otherwise only the head
+  // will be copied, and the rest of linked entries will be ignored.
+  void Copy(const struct addrinfo* head, bool recursive);
+
+  // Appends a copy of |head| and all its linked addrinfos to the stored
+  // addrinfo.
+  void Append(const struct addrinfo* head);
 
   // Sets the port of all addresses in the list to |port| (that is the
   // sin[6]_port field for the sockaddrs).