Version 3.28.9.1 (merged r22168, r22170)

MIPS: KeyedLoadIC should have same register spec as LoadIC.

MIPS: Clean up the global object naming madness.

R=machenbach@chromium.org
BUG=

Review URL: https://codereview.chromium.org/369473006

git-svn-id: https://v8.googlecode.com/svn/trunk@22175 ce2b1a6d-e550-0410-aec6-3dcde31c8c00