Revert accidental r12918 from trunk.

Refactoring incremental marking.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/11377071

git-svn-id: http://v8.googlecode.com/svn/trunk@12922 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
3 files changed