remove V8_ALLOW_ACCESS_TO_PERSISTENT_IMPLICIT and V8_ALLOW_ACCESS_TO_PERSISTENT_ARROW

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/15979014

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14914 ce2b1a6d-e550-0410-aec6-3dcde31c8c00