Remove reference counting from media::DemuxerStream and friends.

media/filters/decrypting_demuxer_stream_unittest.cc

Index: media/filters/decrypting_demuxer_stream_unittest.cc
diff --git a/media/filters/decrypting_demuxer_stream_unittest.cc b/media/filters/decrypting_demuxer_stream_unittest.cc
index 3c87d8bd43194e09ef1ae81ccae487fcf4c8698d..a64ea94845bc7cecefaf1ff646eea6598bda8669 100644
--- a/media/filters/decrypting_demuxer_stream_unittest.cc
+++ b/media/filters/decrypting_demuxer_stream_unittest.cc
@@ -90,7 +90,7 @@ class DecryptingDemuxerStreamTest : public testing::Test {
     EXPECT_CALL(*input_audio_stream_, type())
         .WillRepeatedly(Return(DemuxerStream::AUDIO));
 
-    demuxer_stream_->Initialize(input_audio_stream_,
+    demuxer_stream_->Initialize(input_audio_stream_.get(),
                                 NewExpectedStatusCB(status));
     message_loop_.RunUntilIdle();
   }
@@ -102,7 +102,7 @@ class DecryptingDemuxerStreamTest : public testing::Test {
     EXPECT_CALL(*input_video_stream_, type())
         .WillRepeatedly(Return(DemuxerStream::VIDEO));
 
-    demuxer_stream_->Initialize(input_video_stream_,
+    demuxer_stream_->Initialize(input_video_stream_.get(),
                                 NewExpectedStatusCB(status));
     message_loop_.RunUntilIdle();
   }
@@ -220,10 +220,10 @@ class DecryptingDemuxerStreamTest : public testing::Test {
                                  const scoped_refptr<DecoderBuffer>&));
 
   MessageLoop message_loop_;
-  scoped_refptr<DecryptingDemuxerStream> demuxer_stream_;
+  scoped_ptr<DecryptingDemuxerStream> demuxer_stream_;
   scoped_ptr<StrictMock<MockDecryptor> > decryptor_;
-  scoped_refptr<StrictMock<MockDemuxerStream> > input_audio_stream_;
-  scoped_refptr<StrictMock<MockDemuxerStream> > input_video_stream_;
+  scoped_ptr<StrictMock<MockDemuxerStream> > input_audio_stream_;
+  scoped_ptr<StrictMock<MockDemuxerStream> > input_video_stream_;
 
   DemuxerStream::ReadCB pending_demuxer_read_cb_;
   Decryptor::NewKeyCB key_added_cb_;