[shill] Wire IPConfig objects to dbus

BUG=chromium-os:17154
TEST=unit tests
STATUS=Verified

Change-Id: If4344b1df2806dcff914fe1e79d6f0d7705a6eb3
Reviewed-on: http://gerrit.chromium.org/gerrit/3494
Reviewed-by: Darin Petkov <petkov@chromium.org>
Tested-by: Chris Masone <cmasone@chromium.org>
diff --git a/ipconfig.cc b/ipconfig.cc
index 5e42eb2..339a198 100644
--- a/ipconfig.cc
+++ b/ipconfig.cc
@@ -6,6 +6,8 @@
 
 #include <base/logging.h>
 
+#include "shill/adaptor_interfaces.h"
+
 using std::string;
 
 namespace shill {