[Sync] Removed more uses of libjingle's sigslot

jingle/notifier/communicator/single_login_attempt.h

 // Copyright (c) 2009 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_SINGLE_LOGIN_ATTEMPT_H_
 #define JINGLE_NOTIFIER_COMMUNICATOR_SINGLE_LOGIN_ATTEMPT_H_
 
 #include <string>
 
 #include "base/scoped_ptr.h"
 #include "jingle/notifier/base/xmpp_connection.h"
 #include "jingle/notifier/communicator/xmpp_connection_generator.h"
-#include "talk/base/sigslot.h"
 #include "talk/xmpp/xmppengine.h"
 
 namespace talk_base {
 class Task;
 }
 
 namespace notifier {
 
 class ConnectionSettings;
 class LoginSettings;
 
 // Handles all of the aspects of a single login attempt (across multiple ip
 // addresses) and maintainence. By containing this within one class, when
 // another login attempt is made, this class will be disposed and all of the
 // signalling for the previous login attempt will be cleaned up immediately.
 class SingleLoginAttempt : public XmppConnection::Delegate,
                            public XmppConnectionGenerator::Delegate {
  public:
-  explicit SingleLoginAttempt(LoginSettings* login_settings);
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+
+    virtual void OnConnect(base::WeakPtr<talk_base::Task> base_task) = 0;
+    virtual void OnNeedReconnect() = 0;
+    virtual void OnRedirect(const std::string& redirect_server,
+                            int redirect_port) = 0;
+  };
+
+  // Does not take ownership of |login_settings| or |delegate|.
+  // Neither may be NULL.
+  SingleLoginAttempt(LoginSettings* login_settings, Delegate* delegate);
 
   virtual ~SingleLoginAttempt();
 
   // XmppConnection::Delegate implementation.
   virtual void OnConnect(base::WeakPtr<talk_base::Task> parent);
   virtual void OnError(buzz::XmppEngine::Error error,
                        int error_subcode,
                        const buzz::XmlElement* stream_error);
 
   // XmppConnectionGenerator::Delegate implementation.
   virtual void OnNewSettings(const ConnectionSettings& new_settings);
   virtual void OnExhaustedSettings(bool successfully_resolved_dns,
                                    int first_dns_error);
 
-  // Typically handled by storing the redirect for 5 seconds, and setting it
-  // into LoginSettings, then creating a new SingleLoginAttempt, and doing
-  // StartConnection.
-  //
-  // SignalRedirect(const std::string& redirect_server, int redirect_port);
-  sigslot::signal2<const std::string&, int> SignalRedirect;
-
-  sigslot::signal0<> SignalNeedAutoReconnect;
-
-  sigslot::signal1<base::WeakPtr<talk_base::Task> > SignalConnect;
-
  private:
   LoginSettings* login_settings_;
+  Delegate* delegate_;
   XmppConnectionGenerator connection_generator_;
   scoped_ptr<XmppConnection> xmpp_connection_;
 
   DISALLOW_COPY_AND_ASSIGN(SingleLoginAttempt);
 };
 
 }  // namespace notifier
 
 #endif  // JINGLE_NOTIFIER_COMMUNICATOR_SINGLE_LOGIN_ATTEMPT_H_