Merged r16534 into trunk branch.

Fix compilation with Clang after r16530.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/23530028

git-svn-id: https://v8.googlecode.com/svn/trunk@16535 ce2b1a6d-e550-0410-aec6-3dcde31c8c00