{- -------------------------------------------
  (1) FastScanClosure::do_oop_work() を呼び出すだけ.
      ---------------------------------------- -}

    void FastScanClosure::do_oop(oop* p)       { FastScanClosure::do_oop_work(p); }
    void FastScanClosure::do_oop(narrowOop* p) { FastScanClosure::do_oop_work(p); }