Fix clang/win build.

TBR=jarin@chromium.org

Review URL: https://codereview.chromium.org/494973004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23271 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Stage ES6 generators

R=dslomov@chromium.org
BUG=

Review URL: https://codereview.chromium.org/479543003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23272 ce2b1a6d-e550-0410-aec6-3dcde31c8c00