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

media/audio/audio_manager_factory.h

Index: media/audio/audio_manager_factory.h
diff --git a/media/audio/audio_manager_factory.h b/media/audio/audio_manager_factory.h
index 72501486d1af6bcac315d17dd40ead559859268b..81c5fe52098e31ec88cc2ccac7b3576a5c6eb034 100644
--- a/media/audio/audio_manager_factory.h
+++ b/media/audio/audio_manager_factory.h
@@ -5,8 +5,9 @@
 #ifndef MEDIA_AUDIO_AUDIO_MANAGER_FACTORY_H_
 #define MEDIA_AUDIO_AUDIO_MANAGER_FACTORY_H_
 
+#include <memory>
+
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "media/base/media_export.h"
 
 namespace base {
@@ -27,7 +28,7 @@ class MEDIA_EXPORT AudioManagerFactory {
 
   // Creates an instance of AudioManager implementation. Caller owns the
   // returned instance. |audio_log_factory| must outlive the returned instance.
-  virtual scoped_ptr<AudioManager, AudioManagerDeleter> CreateInstance(
+  virtual std::unique_ptr<AudioManager, AudioManagerDeleter> CreateInstance(
       scoped_refptr<base::SingleThreadTaskRunner> task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner,
       AudioLogFactory* audio_log_factory) = 0;