Replace scoped_ptr with std::unique_ptr in //media/base.

media/base/audio_buffer_converter.h

Index: media/base/audio_buffer_converter.h
diff --git a/media/base/audio_buffer_converter.h b/media/base/audio_buffer_converter.h
index f143f3224d8acb417ab9f7331dec1643a6d57ebf..37d909d95f993b310759bdfa8e587a7cbccb3e1c 100644
--- a/media/base/audio_buffer_converter.h
+++ b/media/base/audio_buffer_converter.h
@@ -6,9 +6,9 @@
 #define MEDIA_BASE_AUDIO_BUFFER_CONVERTER
 
 #include <deque>
+#include <memory>
 
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "media/base/audio_converter.h"
 #include "media/base/audio_parameters.h"
@@ -100,7 +100,7 @@ class MEDIA_EXPORT AudioBufferConverter : public AudioConverter::InputCallback {
   bool is_flushing_;
 
   // The AudioConverter which does the real work here.
-  scoped_ptr<AudioConverter> audio_converter_;
+  std::unique_ptr<AudioConverter> audio_converter_;
 };
 
 }  // namespace media