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

media/audio/win/audio_low_latency_input_win.h

Index: media/audio/win/audio_low_latency_input_win.h
diff --git a/media/audio/win/audio_low_latency_input_win.h b/media/audio/win/audio_low_latency_input_win.h
index c371beda4e3937c177b9295c50a9536cf6c62d63..2cb3606099409a4816db81865474b64492c5c1fe 100644
--- a/media/audio/win/audio_low_latency_input_win.h
+++ b/media/audio/win/audio_low_latency_input_win.h
@@ -67,7 +67,7 @@
 
 #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"
@@ -89,8 +89,7 @@ class AudioManagerWin;
 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.
@@ -255,6 +254,8 @@ class MEDIA_EXPORT WASAPIAudioInputStream
   std::unique_ptr<AudioBus> convert_bus_;
   bool imperfect_buffer_size_conversion_ = false;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(WASAPIAudioInputStream);
 };