Re-enable the harmony => harmony-generators implication after r15079.

R=danno@chromium.org
BUG=

Review URL: https://codereview.chromium.org/16815002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15081 ce2b1a6d-e550-0410-aec6-3dcde31c8c00