[CrOS Tether] Remove the ManagedTetherProperties dictionary.

chromeos/network/network_state_handler.cc

Index: chromeos/network/network_state_handler.cc
diff --git a/chromeos/network/network_state_handler.cc b/chromeos/network/network_state_handler.cc
index 6aeacbebdab0fa9c834bc6c4cdd222af2763e778..c68b33fcdd2684b1dadf2cfef615bf0d4cbf924d 100644
--- a/chromeos/network/network_state_handler.cc
+++ b/chromeos/network/network_state_handler.cc
@@ -476,8 +476,11 @@ const NetworkState* NetworkStateHandler::GetNetworkStateFromServicePath(
     bool configured_only) const {
   ManagedState* managed =
       GetModifiableManagedState(&network_list_, service_path);
-  if (!managed)
-    return nullptr;
+  if (!managed) {
+    managed = GetModifiableManagedState(&tether_network_list_, service_path);
+    if (!managed)
+      return nullptr;
+  }
   const NetworkState* network = managed->AsNetworkState();
   DCHECK(network);
   if (!network->update_received() ||