1. Make Script::line_ends initialization two-pass to avoid
   dynamic memory allocation
2. Get rid of the original code in messages.js and use
   Script::line_ends instead.

Review URL: http://codereview.chromium.org/21041

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1223 ce2b1a6d-e550-0410-aec6-3dcde31c8c00