Remove calls to MessageLoop::current() in media.

media/audio/sounds/test_data.h

 // Copyright 2013 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 MEDIA_AUDIO_SOUNDS_TEST_DATA_H_
 #define MEDIA_AUDIO_SOUNDS_TEST_DATA_H_
 
 #include <stddef.h>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/single_thread_task_runner.h"
 #include "media/audio/sounds/audio_stream_handler.h"
 
-namespace base {
-class MessageLoop;
-}
-
 namespace media {
 
 const int kTestAudioKey = 1000;
 
 const char kTestAudioData[] =
     "RIFF\x28\x00\x00\x00WAVEfmt \x10\x00\x00\x00"
     "\x01\x00\x02\x00\x80\xbb\x00\x00\x00\x77\x01\x00\x02\x00\x10\x00"
     "data\x04\x00\x00\x00\x01\x00\x01\x00";
 const size_t kTestAudioDataSize = arraysize(kTestAudioData) - 1;
 
 class TestObserver : public AudioStreamHandler::TestObserver {
  public:
   TestObserver(const base::Closure& quit);
   ~TestObserver() override;
 
   // AudioStreamHandler::TestObserver implementation:
   void OnPlay() override;
   void OnStop(size_t cursor) override;
 
   int num_play_requests() const { return num_play_requests_; }
   int num_stop_requests() const { return num_stop_requests_; }
   int cursor() const { return cursor_; }
 
  private:
-  base::MessageLoop* loop_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   base::Closure quit_;
 
   int num_play_requests_;
   int num_stop_requests_;
   int cursor_;
 
   DISALLOW_COPY_AND_ASSIGN(TestObserver);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_SOUNDS_TEST_DATA_H_