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

media/audio/android/opensles_output.h

Index: media/audio/android/opensles_output.h
diff --git a/media/audio/android/opensles_output.h b/media/audio/android/opensles_output.h
index 443f40a634610279bdd0f034edb71a863d94317b..954ab99ed5fb92e03b8e4c9a4626ff538b60dc58 100644
--- a/media/audio/android/opensles_output.h
+++ b/media/audio/android/opensles_output.h
@@ -10,6 +10,8 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/synchronization/lock.h"
@@ -118,7 +120,7 @@ class OpenSLESOutputStream : public AudioOutputStream {
   float volume_;
 
   // Container for retrieving data from AudioSourceCallback::OnMoreData().
-  scoped_ptr<AudioBus> audio_bus_;
+  std::unique_ptr<AudioBus> audio_bus_;
 
   DISALLOW_COPY_AND_ASSIGN(OpenSLESOutputStream);
 };