Revert 168742 "Introduce HeapTerminatedArray and HeapTerminatedA..."

This breaks blink_heap_unittests on Android.
> Introduce HeapTerminatedArray and HeapTerminatedArrayBuilder.
> 
> BUG=
> 
> Review URL: https://codereview.chromium.org/183893032

TBR=vegorov@chromium.org

Review URL: https://codereview.chromium.org/191843002

git-svn-id: svn://svn.chromium.org/blink/trunk@168758 bbb929c8-8fbe-4397-9dbb-9b2b20218538