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

media/audio/audio_output_dispatcher_impl.h

Index: media/audio/audio_output_dispatcher_impl.h
diff --git a/media/audio/audio_output_dispatcher_impl.h b/media/audio/audio_output_dispatcher_impl.h
index f2295beb55f8f8975d5d58f7b0bd2e962a8df16d..0923319fab88f324afa0944bf180476d20b4aa87 100644
--- a/media/audio/audio_output_dispatcher_impl.h
+++ b/media/audio/audio_output_dispatcher_impl.h
@@ -16,6 +16,7 @@
 #include <stddef.h>
 
 #include <map>
+#include <memory>
 #include <vector>
 
 #include "base/macros.h"
@@ -91,7 +92,7 @@ class MEDIA_EXPORT AudioOutputDispatcherImpl : public AudioOutputDispatcher {
   typedef std::map<AudioOutputProxy*, AudioOutputStream*> AudioStreamMap;
   AudioStreamMap proxy_to_physical_map_;
 
-  scoped_ptr<AudioLog> audio_log_;
+  std::unique_ptr<AudioLog> audio_log_;
   typedef std::map<AudioOutputStream*, int> AudioStreamIDMap;
   AudioStreamIDMap audio_stream_ids_;
   int audio_stream_id_;