Fix windows build (size_t vs. int) some more.

TBR=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/336803002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21845 ce2b1a6d-e550-0410-aec6-3dcde31c8c00