Recommit coderanges putting code objects within a 2 GB range, reserving only a 256 MB range of virtual memory for the code range.
Review URL: http://codereview.chromium.org/243087

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3018 ce2b1a6d-e550-0410-aec6-3dcde31c8c00