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

media/audio/android/audio_record_input.h

Index: media/audio/android/audio_record_input.h
diff --git a/media/audio/android/audio_record_input.h b/media/audio/android/audio_record_input.h
index 4c0baceaaee074906c0c4ad987cdf9cc2589c304..cd2e10e66e8d0df02bce642a023eb2b9ee9b2d34 100644
--- a/media/audio/android/audio_record_input.h
+++ b/media/audio/android/audio_record_input.h
@@ -7,6 +7,8 @@
 
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/android/jni_android.h"
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
@@ -75,7 +77,7 @@ class MEDIA_EXPORT AudioRecordInputStream : public AudioInputStream {
   // Owned by j_audio_record_.
   uint8_t* direct_buffer_address_;
 
-  scoped_ptr<media::AudioBus> audio_bus_;
+  std::unique_ptr<media::AudioBus> audio_bus_;
   int bytes_per_sample_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRecordInputStream);