Move Demuxer::set_host() to Initialize().

media/base/demuxer.cc

Index: media/base/demuxer.cc
diff --git a/media/base/demuxer.cc b/media/base/demuxer.cc
index f3aa3407085868b974fded8d6fecda27f514444f..6cd4e29a48178e3724ee691203bc9523a87bb2ed 100644
--- a/media/base/demuxer.cc
+++ b/media/base/demuxer.cc
@@ -10,16 +10,10 @@ namespace media {
 
 DemuxerHost::~DemuxerHost() {}
 
-Demuxer::Demuxer() : host_(NULL) {}
+Demuxer::Demuxer() {}
 
 Demuxer::~Demuxer() {}
 
-void Demuxer::set_host(DemuxerHost* host) {
-  DCHECK(host);
-  DCHECK(!host_);
-  host_ = host;
-}
-
 void Demuxer::SetPlaybackRate(float playback_rate) {}
 
 void Demuxer::Seek(base::TimeDelta time, const PipelineStatusCB& status_cb) {