Version 3.26.26.1 (merged r21024)

MIPS: Revert r20974, r20991: Unify and simplify the FastCloneShallowArrayStub.

R=machenbach@chromium.org
BUG=

Review URL: https://codereview.chromium.org/257013002

git-svn-id: https://v8.googlecode.com/svn/trunk@21029 ce2b1a6d-e550-0410-aec6-3dcde31c8c00