Convert media/formats to std::unique_ptr

media/formats/webm/webm_content_encodings_client.h

Index: media/formats/webm/webm_content_encodings_client.h
diff --git a/media/formats/webm/webm_content_encodings_client.h b/media/formats/webm/webm_content_encodings_client.h
index 41cb7c04ebd71b8e7ac7af5524e7851ab1f0a209..09dfcf0fac1ae3392653797b934d928f2382efe1 100644
--- a/media/formats/webm/webm_content_encodings_client.h
+++ b/media/formats/webm/webm_content_encodings_client.h
@@ -7,12 +7,12 @@
 
 #include <stdint.h>
 
+#include <memory>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "media/base/media_export.h"
 #include "media/base/media_log.h"
 #include "media/formats/webm/webm_content_encodings.h"
@@ -38,7 +38,7 @@ class MEDIA_EXPORT WebMContentEncodingsClient : public WebMParserClient {
 
  private:
   scoped_refptr<MediaLog> media_log_;
-  scoped_ptr<ContentEncoding> cur_content_encoding_;
+  std::unique_ptr<ContentEncoding> cur_content_encoding_;
   bool content_encryption_encountered_;
   ContentEncodings content_encodings_;