Move Liveness from DemuxerStreamProvider to DemuxerStream.

media/base/stream_parser.cc

Index: media/base/stream_parser.cc
diff --git a/media/base/stream_parser.cc b/media/base/stream_parser.cc
index 942afbf8ec93a9df3f660c987a11c2ab10da8769..2412b8219fc4df639e84e6d1a9b9846dae9db619 100644
--- a/media/base/stream_parser.cc
+++ b/media/base/stream_parser.cc
@@ -12,7 +12,7 @@ namespace media {
 StreamParser::InitParameters::InitParameters(base::TimeDelta duration)
     : duration(duration),
       auto_update_timestamp_offset(false),
-      liveness(Demuxer::LIVENESS_UNKNOWN) {
+      liveness(DemuxerStream::LIVENESS_UNKNOWN) {
 }
 
 StreamParser::StreamParser() {}