Deprecate NonThreadSafe in remoting in favor of SequenceChecker.

remoting/protocol/stream_channel_factory.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 REMOTING_PROTOCOL_STREAM_CHANNEL_FACTORY_H_
 #define REMOTING_PROTOCOL_STREAM_CHANNEL_FACTORY_H_
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 
 namespace remoting {
 namespace protocol {
 
 class P2PStreamSocket;
 
-class StreamChannelFactory : public base::NonThreadSafe {
+class StreamChannelFactory {
  public:
   // TODO(sergeyu): Specify connection error code when channel
   // connection fails.
   typedef base::Callback<void(std::unique_ptr<P2PStreamSocket>)>
       ChannelCreatedCallback;
 
   StreamChannelFactory() {}
 
   // Creates new channels and calls the |callback| when then new channel is
   // created and connected. The |callback| is called with nullptr if connection
   // failed for any reason. Callback may be called synchronously, before the
   // call returns. All channels must be destroyed, and CancelChannelCreation()
   // called for any pending channels, before the factory is destroyed.
   virtual void CreateChannel(const std::string& name,
                              const ChannelCreatedCallback& callback) = 0;
 
   // Cancels a pending CreateChannel() operation for the named channel. If the
   // channel creation already completed then canceling it has no effect. When
   // shutting down this method must be called for each channel pending creation.
   virtual void CancelChannelCreation(const std::string& name) = 0;
 
  protected:
   virtual ~StreamChannelFactory() {}
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(StreamChannelFactory);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_STREAM_CHANNEL_FACTORY_H_