'throw %NAME(..)' cause hydrogen optimizations to be disabled for
surrounding function. This patch rectifies.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/71153004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17832 ce2b1a6d-e550-0410-aec6-3dcde31c8c00