Remove gc greedy mode.

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/227553005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20550 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Handlify TransitionElements in runtime.cc.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/227113007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20551 ce2b1a6d-e550-0410-aec6-3dcde31c8c00