Re-enable escape analysis.

R=danno@chromium.org, mstarzinger@chromium.org
LOG=Y
BUG=

Review URL: https://codereview.chromium.org/142843004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19021 ce2b1a6d-e550-0410-aec6-3dcde31c8c00