Two tiny refactorings: Removed a bit of copy-n-paste. Moved LargeObjectChunk::Free from header to implementation, it does a syscall, anyway.
Review URL: http://codereview.chromium.org/7744023

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9017 ce2b1a6d-e550-0410-aec6-3dcde31c8c00