Revert of [CrOS Tether] Add the notion of a tether DeviceState.

chromeos/network/managed_state.h

 // 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.
 
 #ifndef CHROMEOS_NETWORK_MANAGED_STATE_H_
 #define CHROMEOS_NETWORK_MANAGED_STATE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 94 matching lines @@
                       std::string* out_value);
   bool GetUInt32Value(const std::string& key,
                       const base::Value& value,
                       uint32_t* out_value);
 
   void set_name(const std::string& name) { name_ = name; }
   void set_type(const std::string& type) { type_ = type; }
 
  private:
   friend class NetworkChangeNotifierChromeosUpdateTest;
-  friend class NetworkStateHandler;
 
   ManagedType managed_type_;
 
   // The path (e.g. service path or device path) of the managed state object.
   std::string path_;
 
   // Common properties shared by all managed state objects.
   std::string name_;  // shill::kNameProperty
   std::string type_;  // shill::kTypeProperty
 
   // Set to true when the an update has been received.
   bool update_received_;
 
   // Tracks when an update has been requested.
   bool update_requested_;
 
   DISALLOW_COPY_AND_ASSIGN(ManagedState);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_NETWORK_MANAGED_STATE_H_