Fix Win32 buildbreak (caused by overriden methods that have disappeared
while having the patch out for code review).

R=danno@chromium.org
BUG=

Review URL: https://codereview.chromium.org/136303004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18627 ce2b1a6d-e550-0410-aec6-3dcde31c8c00