Convert //chromecast from scoped_ptr to std::unique_ptr

chromecast/media/cma/base/decoder_buffer_adapter.h

Index: chromecast/media/cma/base/decoder_buffer_adapter.h
diff --git a/chromecast/media/cma/base/decoder_buffer_adapter.h b/chromecast/media/cma/base/decoder_buffer_adapter.h
index d3da104ae5f7178a0cd8221e5b4e7aed179c9c03..c42fc9184c67bbcc974bb597e557abb7ee316903 100644
--- a/chromecast/media/cma/base/decoder_buffer_adapter.h
+++ b/chromecast/media/cma/base/decoder_buffer_adapter.h
@@ -8,9 +8,10 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "chromecast/media/cma/base/decoder_buffer_base.h"
 
 namespace media {
@@ -48,7 +49,7 @@ class DecoderBufferAdapter : public DecoderBufferBase {
 
   StreamId stream_id_;
   scoped_refptr<::media::DecoderBuffer> const buffer_;
-  mutable scoped_ptr<CastDecryptConfig> decrypt_config_;
+  mutable std::unique_ptr<CastDecryptConfig> decrypt_config_;
 
   DISALLOW_COPY_AND_ASSIGN(DecoderBufferAdapter);
 };