Directly call ChunkDemuxer::Initialize completion callback.

media/filters/chunk_demuxer.h

Index: media/filters/chunk_demuxer.h
diff --git a/media/filters/chunk_demuxer.h b/media/filters/chunk_demuxer.h
index 3d0409e90f74051a1852a25ca07df48d404f7dd4..04f8791b8adb733a29fc64464db34905a8d80502 100644
--- a/media/filters/chunk_demuxer.h
+++ b/media/filters/chunk_demuxer.h
@@ -193,7 +193,7 @@ class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
   // |enable_text| Process inband text tracks in the normal way when true,
   //   otherwise ignore them.
   void Initialize(DemuxerHost* host,
-                  const PipelineStatusCB& cb,
+                  const PipelineStatusCB& init_cb,
                   bool enable_text_tracks) override;
   void Stop() override;
   void Seek(base::TimeDelta time, const PipelineStatusCB& cb) override;