chromeos: Cleanup class/struct fwd declarations

chromeos/dbus/shill_device_client.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_DEVICE_CLIENT_H_
 #define CHROMEOS_DBUS_SHILL_DEVICE_CLIENT_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "chromeos/chromeos_export.h"
 #include "chromeos/dbus/dbus_client.h"
 #include "chromeos/dbus/shill_client_helper.h"
 
 namespace base {
 
 class Value;
-class DictionaryValue;
 
 }  // namespace base
 
 namespace dbus {
 
 class ObjectPath;
 
 }  // namespace dbus
 
 namespace net {
@@ skipping 177 matching lines @@
   // Create() should be used instead.
   ShillDeviceClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ShillDeviceClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_SHILL_DEVICE_CLIENT_H_