Remove reference counting from media::DemuxerStream and friends.

media/filters/decrypting_audio_decoder_unittest.cc

Index: media/filters/decrypting_audio_decoder_unittest.cc
diff --git a/media/filters/decrypting_audio_decoder_unittest.cc b/media/filters/decrypting_audio_decoder_unittest.cc
index af0e81e59534f786849b506de219ec8362204d9e..67df11f6ce19f7a097b0cebed072a363bd3e64e7 100644
--- a/media/filters/decrypting_audio_decoder_unittest.cc
+++ b/media/filters/decrypting_audio_decoder_unittest.cc
@@ -92,7 +92,7 @@ class DecryptingAudioDecoderTest : public testing::Test {
   void InitializeAndExpectStatus(const AudioDecoderConfig& config,
                                  PipelineStatus status) {
     demuxer_->set_audio_decoder_config(config);
-    decoder_->Initialize(demuxer_, NewExpectedStatusCB(status),
+    decoder_->Initialize(demuxer_.get(), NewExpectedStatusCB(status),
                          base::Bind(&MockStatisticsCB::OnStatistics,
                                     base::Unretained(&statistics_cb_)));
     message_loop_.RunUntilIdle();
@@ -219,7 +219,7 @@ class DecryptingAudioDecoderTest : public testing::Test {
   base::MessageLoop message_loop_;
   scoped_ptr<DecryptingAudioDecoder> decoder_;
   scoped_ptr<StrictMock<MockDecryptor> > decryptor_;
-  scoped_refptr<StrictMock<MockDemuxerStream> > demuxer_;
+  scoped_ptr<StrictMock<MockDemuxerStream> > demuxer_;
   MockStatisticsCB statistics_cb_;
   AudioDecoderConfig config_;