G1OldGenPool::G1OldGenPool(G1CollectedHeap* g1h) :

  {- -------------------------------------------
  (1) スーパークラスの初期化
      ---------------------------------------- -}

      G1MemoryPoolSuper(g1h,
                        "G1 Old Gen",
                        old_space_committed(g1h), /* init_size */
                        true /* support_usage_threshold */) { }