Use using declaration instead of type aliasing
Use using declaration instead of type aliasing

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