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

media/cast/net/rtp/rtp_sender.h

Index: media/cast/net/rtp/rtp_sender.h
diff --git a/media/cast/net/rtp/rtp_sender.h b/media/cast/net/rtp/rtp_sender.h
index 7835e2f9d8f3d1ab40e08d40fe1d320ca10550f7..8db0f780a0786c50365755466b788831913de406 100644
--- a/media/cast/net/rtp/rtp_sender.h
+++ b/media/cast/net/rtp/rtp_sender.h
@@ -11,10 +11,10 @@
 #include <stdint.h>
 
 #include <map>
+#include <memory>
 #include <set>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "media/cast/cast_environment.h"
@@ -73,7 +73,7 @@ class RtpSender {
 
   RtpPacketizerConfig config_;
   PacketStorage storage_;
-  scoped_ptr<RtpPacketizer> packetizer_;
+  std::unique_ptr<RtpPacketizer> packetizer_;
   PacedSender* const transport_;
   scoped_refptr<base::SingleThreadTaskRunner> transport_task_runner_;