Revert "Fix a bug in the timing of initialization"
Revert "Fix a bug in the timing of initialization"

This reverts commit ced4dea4d8b8f1f15225217299fcddb69eae9f36.

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