Fixed lol SetProperty() calls to specify the needed strict mode.

Patch by Mark Lam from Hewlett-Packard Development Company, LP

Review URL: http://codereview.chromium.org/6615006


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7032 ce2b1a6d-e550-0410-aec6-3dcde31c8c00