Merged r20033, r20138 into 3.24 branch.

Fix TransitionElementsKindStub to handle non-JSArray objects correctly.

Fix missing access check in Runtime_SetPrototype.

BUG=352982,chromium:354123
R=ulan@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/212623002

git-svn-id: https://v8.googlecode.com/svn/branches/3.24@20269 ce2b1a6d-e550-0410-aec6-3dcde31c8c00