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

media/audio/virtual_audio_input_stream.h

Index: media/audio/virtual_audio_input_stream.h
diff --git a/media/audio/virtual_audio_input_stream.h b/media/audio/virtual_audio_input_stream.h
index 106e04d728448ac90a5b18f46d62223b33c3ae37..60b4efa7032f4f5ee223a98a34b9f0719a23e478 100644
--- a/media/audio/virtual_audio_input_stream.h
+++ b/media/audio/virtual_audio_input_stream.h
@@ -8,10 +8,10 @@
 #include <stdint.h>
 
 #include <map>
+#include <memory>
 #include <set>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 #include "media/audio/audio_io.h"
@@ -108,7 +108,7 @@ class MEDIA_EXPORT VirtualAudioInputStream : public AudioInputStream {
   // Handles callback timing for consumption of audio data.
   FakeAudioWorker fake_worker_;
 
-  scoped_ptr<AudioBus> audio_bus_;
+  std::unique_ptr<AudioBus> audio_bus_;
 
   base::ThreadChecker thread_checker_;