Resolve RFC 6761 localhost names to loopback

net/base/net_util.h

Index: net/base/net_util.h
diff --git a/net/base/net_util.h b/net/base/net_util.h
index f2ba404ffddcb18a6bc433fabe7ad1e2991924d5..92b11c11132cdc4156a43a1609c42776924fa025 100644
--- a/net/base/net_util.h
+++ b/net/base/net_util.h
@@ -354,6 +354,13 @@ const uint16_t* GetPortFieldFromSockaddr(const struct sockaddr* address,
 NET_EXPORT_PRIVATE int GetPortFromSockaddr(const struct sockaddr* address,
                                            socklen_t address_len);
 
+// Returns true if |host| is one of the names (e.g. "localhost") that
+// indicate a loopback. Sets |isLocalhost6| to true if |host| is one of
+// the special names (e.g. "localhost6") that indicates an IPv6
+// loopback.
+NET_EXPORT_PRIVATE bool IsLocalhostHostname(const std::string& host,
+                                            bool* isLocalhost6);
+
 // Returns true if |host| is one of the names (e.g. "localhost") or IP
 // addresses (IPv4 127.0.0.0/8 or IPv6 ::1) that indicate a loopback.
 //