Grid in subcontainer having layout anchor should adhere and occupy full screen

I am trying to fit the grid which is in a subcontainer with layout as anchor and flex 1 as it is part of main container with layout as vbox, should occupy the remaining of the screen.

To explain the exact structure attached is the jsfiddle link.

http://ift.tt/1imhi6Q

As we can see there is a space below the grid.

Any kind of help is appreciated.