Merge virtual allocation randomization fix to 2.3 branch. The randomization made us commit unused memory.
Review URL: http://codereview.chromium.org/3927002

git-svn-id: http://v8.googlecode.com/svn/branches/2.3@5669 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2 files changed