Fix compile error.

LOG=N
TBR=yurys@chromium.org,dslomov@chromium.org

Review URL: https://codereview.chromium.org/166193005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19449 ce2b1a6d-e550-0410-aec6-3dcde31c8c00