[CrOS Tether] Update NetworkConfigurationHandler::GetShillProperties() to work with Tether networks.

chromeos/network/onc/onc_utils.cc

Index: chromeos/network/onc/onc_utils.cc
diff --git a/chromeos/network/onc/onc_utils.cc b/chromeos/network/onc/onc_utils.cc
index 18154f36fe59730960d757460e342f8016765906..2d0dd33f511f80957b67b8c5926d7d5967bd20fa 100644
--- a/chromeos/network/onc/onc_utils.cc
+++ b/chromeos/network/onc/onc_utils.cc
@@ -31,7 +31,9 @@
 #include "chromeos/network/onc/onc_translator.h"
 #include "chromeos/network/onc/onc_utils.h"
 #include "chromeos/network/onc/onc_validator.h"
+#include "chromeos/network/tether_constants.h"
 #include "components/device_event_log/device_event_log.h"
+#include "components/onc/onc_constants.h"
 #include "components/onc/onc_pref_names.h"
 #include "components/prefs/pref_service.h"
 #include "components/proxy_config/proxy_config_dictionary.h"
@@ -1326,5 +1328,19 @@ bool HasPolicyForNetwork(const PrefService* profile_prefs,
   return policy != NULL;
 }
 
+bool IsTetherShillDictionary(const base::DictionaryValue& dict) {
+  std::string network_type;
+  return dict.GetStringWithoutPathExpansion(shill::kTypeProperty,
+                                            &network_type) &&
+         network_type == kTypeTether;
+}
+
+bool IsTetherOncDictionary(const base::DictionaryValue& dict) {
+  std::string network_type;
+  return dict.GetStringWithoutPathExpansion(network_config::kType,
+                                            &network_type) &&
+         network_type == network_config::kTether;
+}
+
 }  // namespace onc
 }  // namespace chromeos