Replace deprecated base::NonThreadSafe in media/audio in favor of SequenceChecker.

media/audio/win/audio_low_latency_input_win.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.
 //
 // Implementation of AudioInputStream for Windows using Windows Core Audio
 // WASAPI for low latency capturing.
 //
 // Overview of operation:
 //
 // - An object of WASAPIAudioInputStream is created by the AudioManager
@@ skipping 49 matching lines @@
 #include <MMDeviceAPI.h>
 #include <endpointvolume.h>
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/simple_thread.h"
 #include "base/win/scoped_co_mem.h"
 #include "base/win/scoped_com_initializer.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/scoped_handle.h"
 #include "media/audio/agc_audio_stream.h"
 #include "media/base/audio_converter.h"
 #include "media/base/audio_parameters.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 class AudioBlockFifo;
 class AudioBus;
 class AudioManagerWin;
 
 // AudioInputStream implementation using Windows Core Audio APIs.
 class MEDIA_EXPORT WASAPIAudioInputStream
     : public AgcAudioStream<AudioInputStream>,
       public base::DelegateSimpleThread::Delegate,
-      public AudioConverter::InputCallback,
-      NON_EXPORTED_BASE(public base::NonThreadSafe) {
+      public AudioConverter::InputCallback {
  public:
   // The ctor takes all the usual parameters, plus |manager| which is the
   // the audio manager who is creating this object.
   WASAPIAudioInputStream(AudioManagerWin* manager,
                          const AudioParameters& params,
                          const std::string& device_id);
 
   // The dtor is typically called by the AudioManager only and it is usually
   // triggered by calling AudioInputStream::Close().
   ~WASAPIAudioInputStream() override;
@@ skipping 144 matching lines @@
 
   // Used for the captured audio on the callback thread.
   std::unique_ptr<AudioBlockFifo> fifo_;
 
   // If the caller requires resampling (should only be in exceptional cases and
   // ideally, never), we support using an AudioConverter.
   std::unique_ptr<AudioConverter> converter_;
   std::unique_ptr<AudioBus> convert_bus_;
   bool imperfect_buffer_size_conversion_ = false;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(WASAPIAudioInputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_WIN_AUDIO_LOW_LATENCY_INPUT_WIN_H_