Fixes for Windows and Mac builds after r25250.

R=verwaest@chromium.org
TBR=verwaest@chromium.org

Review URL: https://codereview.chromium.org/717573002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25251 ce2b1a6d-e550-0410-aec6-3dcde31c8c00