Convert //media/audio from scoped_ptr to std::unique_ptr

media/audio/clockless_audio_sink.cc

Index: media/audio/clockless_audio_sink.cc
diff --git a/media/audio/clockless_audio_sink.cc b/media/audio/clockless_audio_sink.cc
index ede067cd2802df0f89d94709fa903ed2afed0c83..911d09d09c75aba1542e772fb7abc40dc5a1737d 100644
--- a/media/audio/clockless_audio_sink.cc
+++ b/media/audio/clockless_audio_sink.cc
@@ -67,11 +67,11 @@ class ClocklessAudioSinkThread : public base::DelegateSimpleThread::Delegate {
    }
 
   AudioRendererSink::RenderCallback* callback_;
-  scoped_ptr<AudioBus> audio_bus_;
-  scoped_ptr<base::WaitableEvent> stop_event_;
-  scoped_ptr<base::DelegateSimpleThread> thread_;
+  std::unique_ptr<AudioBus> audio_bus_;
+  std::unique_ptr<base::WaitableEvent> stop_event_;
+  std::unique_ptr<base::DelegateSimpleThread> thread_;
   base::TimeDelta playback_time_;
-  scoped_ptr<AudioHash> audio_hash_;
+  std::unique_ptr<AudioHash> audio_hash_;
 };
 
 ClocklessAudioSink::ClocklessAudioSink()