Reduce stack size in chunked-big-script.html and re-enable.

BUG=305759
R=ojan@chromium.org

Review URL: https://codereview.chromium.org/26759002

git-svn-id: svn://svn.chromium.org/blink/trunk@159288 bbb929c8-8fbe-4397-9dbb-9b2b20218538