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

chromeos/network/onc/onc_utils.h

Index: chromeos/network/onc/onc_utils.h
diff --git a/chromeos/network/onc/onc_utils.h b/chromeos/network/onc/onc_utils.h
index 2655c366e10bef99617e2d1521e8fc0d4c44f18d..b808e1a11ae1c32b66250473e4b9a9c4e7f83418 100644
--- a/chromeos/network/onc/onc_utils.h
+++ b/chromeos/network/onc/onc_utils.h
@@ -206,6 +206,14 @@ CHROMEOS_EXPORT bool HasPolicyForNetwork(const PrefService* profile_prefs,
                                          const PrefService* local_state_prefs,
                                          const NetworkState& network);
 
+// Returns whether |dict| is a Shill dictionary corresponding to a Tether
+// network.
+CHROMEOS_EXPORT bool IsTetherShillDictionary(const base::DictionaryValue& dict);
+
+// Returns whether |dict| is an ONC dictionary corresponding to a Tether
+// network.
+CHROMEOS_EXPORT bool IsTetherOncDictionary(const base::DictionaryValue& dict);
+
 }  // namespace onc
 }  // namespace chromeos