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

media/filters/source_buffer_stream_unittest.cc

Index: media/filters/source_buffer_stream_unittest.cc
diff --git a/media/filters/source_buffer_stream_unittest.cc b/media/filters/source_buffer_stream_unittest.cc
index 1eeebabb6ef892943b573948e995a92ffa797b74..1c73e0581231f78e064b8bdea645dfb0cdf62819 100644
--- a/media/filters/source_buffer_stream_unittest.cc
+++ b/media/filters/source_buffer_stream_unittest.cc
@@ -422,7 +422,7 @@ class SourceBufferStreamTest : public testing::Test {
 
   base::TimeDelta frame_duration() const { return frame_duration_; }
 
-  scoped_ptr<SourceBufferStream> stream_;
+  std::unique_ptr<SourceBufferStream> stream_;
   VideoDecoderConfig video_config_;
   AudioDecoderConfig audio_config_;
   scoped_refptr<StrictMock<MockMediaLog>> media_log_;