Allow to neuter array buffer twice in tests.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/209083005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20241 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert "This implements allocating small typed arrays in heap."

This reverts commit r20240 for breaking Windows build.

TBR=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/211003003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20242 ce2b1a6d-e550-0410-aec6-3dcde31c8c00