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

media/cast/test/loopback_transport.h

Index: media/cast/test/loopback_transport.h
diff --git a/media/cast/test/loopback_transport.h b/media/cast/test/loopback_transport.h
index 60851a6867d6f0cd8a2890d6088aed4c039dbe0d..130d34fc284336b5bc4e0ce4f199891f7048b9b8 100644
--- a/media/cast/test/loopback_transport.h
+++ b/media/cast/test/loopback_transport.h
@@ -7,9 +7,10 @@
 
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "media/cast/cast_environment.h"
 #include "media/cast/net/cast_transport_config.h"
 
@@ -50,14 +51,14 @@ class LoopBackTransport : public PacketTransport {
   // If |pipe| is NULL then the data flow looks like:
   // SendPacket() -> Fake loopback pipe -> |packet_receiver|.
   void Initialize(
-      scoped_ptr<test::PacketPipe> pipe,
+      std::unique_ptr<test::PacketPipe> pipe,
       const PacketReceiverCallback& packet_receiver,
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       base::TickClock* clock);
 
  private:
   const scoped_refptr<CastEnvironment> cast_environment_;
-  scoped_ptr<test::PacketPipe> packet_pipe_;
+  std::unique_ptr<test::PacketPipe> packet_pipe_;
   int64_t bytes_sent_;
 
   DISALLOW_COPY_AND_ASSIGN(LoopBackTransport);