Remove extended_extra_ic_state and extend extra_ic_state instead.

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/159013003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19287 ce2b1a6d-e550-0410-aec6-3dcde31c8c00