Move Liveness from DemuxerStreamProvider to DemuxerStream.

media/filters/decrypting_demuxer_stream.cc

Index: media/filters/decrypting_demuxer_stream.cc
diff --git a/media/filters/decrypting_demuxer_stream.cc b/media/filters/decrypting_demuxer_stream.cc
index 2eae710d1fa7503a8785e7881ae920fd02253494..601fd4681b7b9b6114971556ead33faf0152b55c 100644
--- a/media/filters/decrypting_demuxer_stream.cc
+++ b/media/filters/decrypting_demuxer_stream.cc
@@ -121,11 +121,16 @@ VideoDecoderConfig DecryptingDemuxerStream::video_decoder_config() {
   return video_config_;
 }
 
-DemuxerStream::Type DecryptingDemuxerStream::type() {
+DemuxerStream::Type DecryptingDemuxerStream::type() const {
   DCHECK(state_ != kUninitialized && state_ != kDecryptorRequested) << state_;
   return demuxer_stream_->type();
 }
 
+DemuxerStream::Liveness DecryptingDemuxerStream::liveness() const {
+  DCHECK(state_ != kUninitialized && state_ != kDecryptorRequested) << state_;
+  return demuxer_stream_->liveness();
+}
+
 void DecryptingDemuxerStream::EnableBitstreamConverter() {
   demuxer_stream_->EnableBitstreamConverter();
 }