Fix update documents of GoogleNet.extract
Fix update documents of GoogleNet.extract

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