message: Updating out-of-date comment.
diff: @@ -1163,9 +1163,7 @@ void VirtualScheduler::GenerateRunMetadata(RunMetadata* metadata) {
  node_stats->set_timeline_label(timeline_label);
  }
  node_stats->set_node_name(node_def->name());
  - // Timestamps in microseconds.
  - // TODO(b/138165866): Remove once TimelineServer support is no longer
  - // needed.
  + // Timestamps in microseconds (can be used by timeline_server).
  node_stats->set_op_start_rel_micros(0);
  node_stats->set_all_start_micros(
  nodestate.time_scheduled.asMicroSeconds().count());
  @@ -1175,7 +1173,7 @@ void VirtualScheduler::GenerateRunMetadata(RunMetadata* metadata) {
  node_stats->set_all_end_rel_micros(
  nodestate.time_finished.asMicroSeconds().count() -
  nodestate.time_scheduled.asMicroSeconds().count());
  - // Timestamps in nanoseconds.
  + // Timestamps in nanoseconds (can be used by xprof trace).
  node_stats->set_op_start_rel_nanos(0);
  node_stats->set_all_start_nanos(nodestate.time_scheduled.count());
  node_stats->set_op_end_rel_nanos(nodestate.time_finished.count() -
  