Re-add commented code
Re-add commented code

okuta/chainer,hvy/chainer,wkentaro/chainer,keisuke-umezawa/chainer,jnishi/chainer,ktnyt/chainer,ktnyt/chainer,niboshi/chainer,wkentaro/chainer,niboshi/chainer,ktnyt/chainer,hvy/chainer,tkerola/chainer,niboshi/chainer,chainer/chainer,wkentaro/chainer,chainer/chainer,ktnyt/chainer,hvy/chainer,wkentaro/chainer,chainer/chainer,okuta/chainer,rezoo/chainer,jnishi/chainer,okuta/chainer,jnishi/chainer,niboshi/chainer,okuta/chainer,hvy/chainer,chainer/chainer,keisuke-umezawa/chainer,keisuke-umezawa/chainer,jnishi/chainer,keisuke-umezawa/chainer,pfnet/chainer