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

media/audio/virtual_audio_output_stream_unittest.cc

Index: media/audio/virtual_audio_output_stream_unittest.cc
diff --git a/media/audio/virtual_audio_output_stream_unittest.cc b/media/audio/virtual_audio_output_stream_unittest.cc
index a391f6ee4c579020e651f5c5f076115a51cafa45..f59da014f827ae35297a013197511dae8590b103 100644
--- a/media/audio/virtual_audio_output_stream_unittest.cc
+++ b/media/audio/virtual_audio_output_stream_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 <memory>
+
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/macros.h"
@@ -68,7 +70,7 @@ class VirtualAudioOutputStreamTest : public testing::Test {
   }
 
  private:
-  scoped_ptr<base::Thread> audio_thread_;
+  std::unique_ptr<base::Thread> audio_thread_;
   scoped_refptr<base::SingleThreadTaskRunner> audio_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(VirtualAudioOutputStreamTest);