CallIC::GenerateInitialize and KeyedCallIC::GenerateInitialize are
verified safe for GC.

R=ulan@chromium.org
BUG=
TEST=

Review URL: http://codereview.chromium.org/8361028

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9733 ce2b1a6d-e550-0410-aec6-3dcde31c8c00