could themselves be a source of bugs.  Add a flag to switch off
optimizations (--noirregexp-optimization) to aid testing.
Review URL: http://codereview.chromium.org/19538

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1210 ce2b1a6d-e550-0410-aec6-3dcde31c8c00