Replace deprecated base::NonThreadSafe in jingle in favor of SequenceChecker.

jingle/notifier/base/xmpp_connection.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.
 //
 // A class that manages a connection to an XMPP server.
 
 #ifndef JINGLE_NOTIFIER_BASE_XMPP_CONNECTION_H_
 #define JINGLE_NOTIFIER_BASE_XMPP_CONNECTION_H_
 
 #include <memory>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "third_party/libjingle_xmpp/xmpp/xmppengine.h"
 #include "webrtc/base/sigslot.h"
 
 namespace buzz {
 class PreXmppAuth;
 class XmlElement;
 class XmppClientSettings;
 class XmppTaskParentInterface;
 }  // namespace buzz
 
 namespace jingle_glue {
 class TaskPump;
 }  // namespace jingle_glue
 
 namespace notifier {
 
 class WeakXmppClient;
 
-class XmppConnection
-    : public sigslot::has_slots<>,
-      public base::NonThreadSafe {
+class XmppConnection : public sigslot::has_slots<> {
  public:
   class Delegate {
    public:
     // Called (at most once) when a connection has been established.
     // |base_task| can be used by the client as the parent of any Task
     // it creates as long as it is valid (i.e., non-NULL).
     virtual void OnConnect(
         base::WeakPtr<buzz::XmppTaskParentInterface> base_task) = 0;
 
     // Called if an error has occurred (either before or after a call
@@ skipping 43 matching lines @@
   void OnInputLog(const char* data, int len);
   void OnOutputLog(const char* data, int len);
 
   void ClearClient();
 
   std::unique_ptr<jingle_glue::TaskPump> task_pump_;
   base::WeakPtr<WeakXmppClient> weak_xmpp_client_;
   bool on_connect_called_;
   Delegate* delegate_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(XmppConnection);
 };
 
 }  // namespace notifier
 
 #endif  // JINGLE_NOTIFIER_BASE_XMPP_CONNECTION_H_