Fix Windows compile error.

BUG=
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/386603003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22326 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Stray assertion

TBR=marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/381093002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22327 ce2b1a6d-e550-0410-aec6-3dcde31c8c00