[shill] Enable IPConfig to Store/Load itself

BUG=chromium-os:17256
TEST=unit

Change-Id: I7792156f95ecb2e17afaf4e3250ff3dbc0e3dac9
Reviewed-on: http://gerrit.chromium.org/gerrit/4602
Tested-by: Chris Masone <cmasone@chromium.org>
Reviewed-by: Chris Masone <cmasone@chromium.org>
diff --git a/dhcp_config_unittest.cc b/dhcp_config_unittest.cc
index 8746f8b..744e0ad 100644
--- a/dhcp_config_unittest.cc
+++ b/dhcp_config_unittest.cc
@@ -2,13 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "shill/dhcp_config.h"
+
 #include <base/file_util.h>
 #include <base/memory/scoped_temp_dir.h>
 #include <base/stringprintf.h>
 #include <chromeos/dbus/service_constants.h>
+#include <gtest/gtest.h>
 
 #include "shill/dbus_adaptor.h"
-#include "shill/dhcp_config.h"
 #include "shill/dhcp_provider.h"
 #include "shill/mock_control.h"
 #include "shill/mock_dhcp_proxy.h"