When we find an accessor pair as TRANSITION, we are sure it doesn't contain an accessor yet.
When we find an accessor pair as TRANSITION, we are sure it doesn't contain an accessor yet.

Review URL: https://chromiumcodereview.appspot.com/10704185

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@12065 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh