Fix network configurations that use the system CA certs.

chrome/browser/chromeos/options/wifi_config_view.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/options/wifi_config_view.h"
 
 #include "ash/system/chromeos/network/network_connect.h"
 #include "base/bind.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 865 matching lines @@
       shill::kEapSubjectMatchProperty, GetEapSubjectMatch());
 
   SetEapClientCertProperties(properties);
 
   properties->SetBooleanWithoutPathExpansion(
       shill::kEapUseSystemCasProperty, GetEapUseSystemCas());
   properties->SetStringWithoutPathExpansion(
       shill::kEapPasswordProperty, GetPassphrase());
 
   base::ListValue* pem_list = new base::ListValue;
-  pem_list->AppendString(GetEapServerCaCertPEM());
+  std::string ca_cert_pem = GetEapServerCaCertPEM();
+  if (!ca_cert_pem.empty())
+    pem_list->AppendString(ca_cert_pem);
   properties->SetWithoutPathExpansion(
       shill::kEapCaCertPemProperty, pem_list);
 }
 
 void WifiConfigView::Cancel() {
 }
 
 void WifiConfigView::Init(bool show_8021x) {
   const NetworkState* network = GetNetworkState();
   if (network) {
@@ skipping 478 matching lines @@
 void WifiConfigView::ParseEAPUIProperty(NetworkPropertyUIData* property_ui_data,
                                         const NetworkState* network,
                                         const std::string& key) {
   std::string onc_tag = network->type() == shill::kTypeEthernet
                             ? ::onc::ethernet::kEAP
                             : ::onc::wifi::kEAP;
   ParseUIProperty(property_ui_data, network, onc_tag + '.' + key);
 }
 
 }  // namespace chromeos