wifi_sync: add ability to convert WifiCredential to onc properties

components/wifi_sync/network_state_helper_chromeos.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/wifi_sync/network_state_helper_chromeos.h"
 
 #include "base/logging.h"
 #include "chromeos/network/network_state.h"
 #include "chromeos/network/network_state_handler.h"
 #include "chromeos/network/network_type_pattern.h"
@@ skipping 15 matching lines @@
       &networks);
 
   auto credentials(WifiCredential::MakeSet());
   for (const chromeos::NetworkState* network : networks) {
     if (network->profile_path() != shill_profile_path)
       continue;
 
     // TODO(quiche): Fill in the actual passphrase via an asynchronous
     // call to a chromeos::NetworkConfigurationHandler instance's
     // GetProperties method.
-    credentials.insert(
-        WifiCredential(
+    scoped_ptr<WifiCredential> credential =
+        WifiCredential::Create(
             network->raw_ssid(),
             WifiSecurityClassFromShillSecurity(network->security_class()),
-            ""  /* empty passphrase */));
+            ""  /* empty passphrase */);
+    if (!credential)
+      LOG(ERROR) << "Failed to create credential";
+    else
+      credentials.insert(*credential);
   }
   return credentials;
 }
 
 }  // namespace wifi_sync