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

media/audio/win/wavein_input_win.h

Index: media/audio/win/wavein_input_win.h
diff --git a/media/audio/win/wavein_input_win.h b/media/audio/win/wavein_input_win.h
index 21fda42f30ed36b4c50ba31ace6c8e6f7188c0c2..570adbf833ae940f90b6935f5b91de20280699ad 100644
--- a/media/audio/win/wavein_input_win.h
+++ b/media/audio/win/wavein_input_win.h
@@ -5,12 +5,13 @@
 #ifndef MEDIA_AUDIO_WIN_WAVEIN_INPUT_WIN_H_
 #define MEDIA_AUDIO_WIN_WAVEIN_INPUT_WIN_H_
 
-#include <string>
-
 #include <windows.h>
 #include <mmsystem.h>
 #include <stdint.h>
 
+#include <memory>
+#include <string>
+
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/synchronization/lock.h"
@@ -128,7 +129,7 @@ class PCMWaveInAudioInputStream : public AudioInputStream {
 
   // Extra audio bus used for storage of deinterleaved data for the OnData
   // callback.
-  scoped_ptr<media::AudioBus> audio_bus_;
+  std::unique_ptr<media::AudioBus> audio_bus_;
 
   DISALLOW_COPY_AND_ASSIGN(PCMWaveInAudioInputStream);
 };