Patch by Bert Belder.

BUG=v8:64
BUG=v8:964
BUG=v8:1029

Review URL: http://codereview.chromium.org/6525028

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6842 ce2b1a6d-e550-0410-aec6-3dcde31c8c00