This reverts commit r16751 for breaking arm.debug checks.

TBR=ulan@chromium.org

Review URL: https://codereview.chromium.org/24198002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16756 ce2b1a6d-e550-0410-aec6-3dcde31c8c00