Merged r15674 into trunk branch.

Revert 15635: Turn ElementsTransitionAndStore stub into a HydrogenCodeStub

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/19215002

git-svn-id: https://v8.googlecode.com/svn/trunk@15675 ce2b1a6d-e550-0410-aec6-3dcde31c8c00