Block outgoing requests on ports 427 and 548, used by AFP.

Bug: 824130, 847842
Change-Id: I40015be2f20ffb10ea0b95d5dc670a40002d9afc
Reviewed-on: https://chromium-review.googlesource.com/1078917
Commit-Queue: Matt Menke <mmenke@chromium.org>
Reviewed-by: Eric Roman <eroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563152}

net/base/port_util.cc

@@ -58,6 +58,7 @@ const int kRestrictedPorts[] = {
     143,     // imap2
     179,     // BGP
     389,     // ldap
+    427,     // SLP (Also used by Apple Filing Protocol)
     465,     // smtp+ssl
     512,     // print / exec
     513,     // login
@@ -68,6 +69,7 @@ const int kRestrictedPorts[] = {
     531,     // chat
     532,     // netnews
     540,     // uucp
+    548,     // AFP (Apple Filing Protocol)
     556,     // remotefs
     563,     // nntp+ssl
     587,     // stmp?