2.1.0. This means that the next version pushed to trunk will
be the first version in the 2.1.x series. 
Review URL: http://codereview.chromium.org/551139

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3682 ce2b1a6d-e550-0410-aec6-3dcde31c8c00