Fix oversight in type change

TBR=dcarney@chromium.org
BUG=

Review URL: https://codereview.chromium.org/646033005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24627 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Presubmit checks

TBR=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/658733002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24628 ce2b1a6d-e550-0410-aec6-3dcde31c8c00