Cleanup remaining class/struct fwd declarations

jingle/notifier/communicator/login.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 JINGLE_NOTIFIER_COMMUNICATOR_LOGIN_H_
 #define JINGLE_NOTIFIER_COMMUNICATOR_LOGIN_H_
 
 #include <memory>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "jingle/notifier/base/server_information.h"
 #include "jingle/notifier/communicator/login_settings.h"
 #include "jingle/notifier/communicator/single_login_attempt.h"
 #include "net/base/network_change_notifier.h"
 #include "webrtc/libjingle/xmpp/xmppengine.h"
 
 namespace buzz {
-class XmppClient;
 class XmppClientSettings;
 class XmppTaskParentInterface;
 }  // namespace buzz
 
 namespace net {
 class URLRequestContextGetter;
 }  // namespace net
 
 namespace notifier {
 
@@ skipping 88 matching lines @@
   // reconnection state.
   base::TimeDelta reconnect_interval_;
   base::OneShotTimer reconnect_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(Login);
 };
 
 }  // namespace notifier
 
 #endif  // JINGLE_NOTIFIER_COMMUNICATOR_LOGIN_H_