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

chromeos/network/network_state_handler.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 "chromeos/network/network_state_handler.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 1239 matching lines @@
   ManagedState* managed = GetModifiableManagedState(&device_list_, device_path);
   if (!managed)
     return nullptr;
   return managed->AsDeviceState();
 }
 
 NetworkState* NetworkStateHandler::GetModifiableNetworkState(
     const std::string& service_path) 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;
+  }
   return managed->AsNetworkState();
 }
 
 NetworkState* NetworkStateHandler::GetModifiableNetworkStateFromGuid(
     const std::string& guid) const {
   for (auto iter = tether_network_list_.begin();
        iter != tether_network_list_.end(); ++iter) {
     NetworkState* tether_network = (*iter)->AsNetworkState();
     if (tether_network->guid() == guid)
       return tether_network;
@@ skipping 139 matching lines @@
   if (type.MatchesType(shill::kTypeVPN))
     technologies.emplace_back(shill::kTypeVPN);
   if (type.MatchesType(kTypeTether))
     technologies.emplace_back(kTypeTether);
 
   CHECK_GT(technologies.size(), 0ul);
   return technologies;
 }
 
 }  // namespace chromeos