chromeos: Cleanup class/struct fwd declarations

chromeos/dbus/shill_client_helper.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_DBUS_SHILL_CLIENT_HELPER_H_
 #define CHROMEOS_DBUS_SHILL_CLIENT_HELPER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/values.h"
 #include "chromeos/dbus/dbus_method_call_status.h"
 #include "chromeos/dbus/shill_property_changed_observer.h"
 
 namespace base {
 
 class Value;
 class DictionaryValue;
 
 }  // namespace base
 
 namespace dbus {
 
-class Bus;
-class ErrorResponse;
 class MessageWriter;
 class MethodCall;
-class ObjectPath;
 class ObjectProxy;
-class Response;
 class Signal;
 
 }  // namespace dbus
 
 namespace chromeos {
 
 // A class to help implement Shill clients.
 class ShillClientHelper {
  public:
   class RefHolder;
@@ skipping 137 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<ShillClientHelper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ShillClientHelper);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_SHILL_CLIENT_HELPER_H_