Refactor deferred_objects_double_values_ a little in the deoptimization

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/25583004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17226 ce2b1a6d-e550-0410-aec6-3dcde31c8c00