There is only one stub-type in the cache at all times. By ignoring the type up-front, we can in a later phase move cache probing before even computing the type.

BUG=
R=ulan@chromium.org

Review URL: https://chromiumcodereview.appspot.com/25520003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17089 ce2b1a6d-e550-0410-aec6-3dcde31c8c00