Unify media track info reporting on a demuxer level

media/test/pipeline_integration_test_base.h

Index: media/test/pipeline_integration_test_base.h
diff --git a/media/test/pipeline_integration_test_base.h b/media/test/pipeline_integration_test_base.h
index bd31e42d9c7e9c8674618f29fffbe57ac531dff4..0211a85d6fdbe7ce2705b89f37da3247cc9f9148 100644
--- a/media/test/pipeline_integration_test_base.h
+++ b/media/test/pipeline_integration_test_base.h
@@ -142,6 +142,8 @@ class PipelineIntegrationTestBase {
     encrypted_media_init_data_cb_ = encrypted_media_init_data_cb;
   }
 
+  void DemuxerMediaTracksUpdatedCB(scoped_ptr<MediaTracks> tracks);
+
   void OnEnded();
   void OnError(PipelineStatus status);
   void QuitAfterCurrentTimeTask(const base::TimeDelta& quit_time);