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

media/base/seekable_buffer_unittest.cc

Index: media/base/seekable_buffer_unittest.cc
diff --git a/media/base/seekable_buffer_unittest.cc b/media/base/seekable_buffer_unittest.cc
index acce11b4c08a30bebe923130aa1a0991122b1075..8d135590788fbbeaea99375ad49e5892ae2288d3 100644
--- a/media/base/seekable_buffer_unittest.cc
+++ b/media/base/seekable_buffer_unittest.cc
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "media/base/seekable_buffer.h"
+
 #include <stddef.h>
 #include <stdint.h>
 
@@ -9,10 +11,8 @@
 
 #include "base/logging.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "media/base/data_buffer.h"
-#include "media/base/seekable_buffer.h"
 #include "media/base/timestamp_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"