shill: wimax: Connect to a specific WiMAX network with EAP credentials.

BUG=chrome-os-partner:9830
TEST=Build and run unit tests.

Change-Id: I429aff11a610bff93f7debc3f9bdc156fe83a15a
Reviewed-on: https://gerrit.chromium.org/gerrit/23096
Tested-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Darin Petkov <petkov@chromium.org>
Commit-Ready: Ben Chan <benchan@chromium.org>
diff --git a/wimax_network_proxy.cc b/wimax_network_proxy.cc
index ed2dc73..9859d67 100644
--- a/wimax_network_proxy.cc
+++ b/wimax_network_proxy.cc
@@ -20,6 +20,10 @@
 
 WiMaxNetworkProxy::~WiMaxNetworkProxy() {}
 
+DBus::Path WiMaxNetworkProxy::proxy_object_path() const {
+  return proxy_.path();
+}
+
 uint32 WiMaxNetworkProxy::Identifier(Error *error) {
   SLOG(DBus, 2) << __func__;
   try {