Test array creation with explicit None device
Test array creation with explicit None device

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