Version 3.27.34.12 (merged r22693)

CallIC customization stubs must accept that a vector slot is cleared.
(also x87 and mips ports)

R=hpayer@chromium.org
BUG=392114

Review URL: https://codereview.chromium.org/443903002

git-svn-id: https://v8.googlecode.com/svn/branches/3.27@22914 ce2b1a6d-e550-0410-aec6-3dcde31c8c00