Revert "fix"
Revert "fix"

This reverts commit 470de3463c0b18bbc57ba84c91496a3a1dd74e47.

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