Deprecate NonThreadSafe in remoting in favor of SequenceChecker.

remoting/protocol/pseudotcp_adapter.h

 // Copyright 2015 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_PSEUDOTCP_ADAPTER_H_
 #define REMOTING_PROTOCOL_PSEUDOTCP_ADAPTER_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "net/log/net_log_with_source.h"
 #include "remoting/protocol/p2p_stream_socket.h"
 #include "third_party/webrtc/p2p/base/pseudotcp.h"
 
 namespace remoting {
 namespace protocol {
 
 class P2PDatagramSocket;
 
 // PseudoTcpAdapter adapts a P2PDatagramSocket to P2PStreamSocket using
 // PseudoTcp. Because P2PStreamSockets can be deleted during callbacks,
 // while PseudoTcp cannot, the core of the PseudoTcpAdapter is reference
 // counted, with a reference held by the adapter, and an additional reference
 // held on the stack during callbacks.
-class PseudoTcpAdapter : public P2PStreamSocket, base::NonThreadSafe {
+class PseudoTcpAdapter : public P2PStreamSocket {
  public:
   explicit PseudoTcpAdapter(std::unique_ptr<P2PDatagramSocket> socket);
   ~PseudoTcpAdapter() override;
 
   // P2PStreamSocket implementation.
   int Read(const scoped_refptr<net::IOBuffer>& buffer, int buffer_size,
            const net::CompletionCallback& callback) override;
   int Write(const scoped_refptr<net::IOBuffer>& buffer, int buffer_size,
             const net::CompletionCallback& callback) override;
 
@@ skipping 27 matching lines @@
   // flow-control solution.
   void SetWriteWaitsForSend(bool write_waits_for_send);
 
  private:
   class Core;
 
   scoped_refptr<Core> core_;
 
   net::NetLogWithSource net_log_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(PseudoTcpAdapter);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_PSEUDOTCP_ADAPTER_H_