[net] Make IPEndPoint::GetFamily() return AddressFamily and add GetSockAddrFamily() to be used when…

net/socket/socks_client_socket.cc

Index: net/socket/socks_client_socket.cc
diff --git a/net/socket/socks_client_socket.cc b/net/socket/socks_client_socket.cc
index 2842fd109698dd51b2827d956641ea2a72351319..16ef3bd8edb99b6d44e30edda9833104efa71fd6 100644
--- a/net/socket/socks_client_socket.cc
+++ b/net/socket/socks_client_socket.cc
@@ -331,7 +331,7 @@ const std::string SOCKSClientSocket::BuildHandshakeWriteBuffer() const {
   // TODO(eroman): we only ever use the first address in the list. It would be
   //               more robust to try all the IP addresses we have before
   //               failing the connect attempt.
-  CHECK_EQ(AF_INET, endpoint.GetFamily());
+  CHECK_EQ(ADDRESS_FAMILY_IPV4, endpoint.GetFamily());
   CHECK_LE(endpoint.address().size(), sizeof(request.ip));
   memcpy(&request.ip, &endpoint.address()[0], endpoint.address().size());