tree 3c5f8d5c8f5d3f53dc0fd0d6a4b90eb8df30f53b
parent e8df25a9c6f9118e0136904883a777052c522cb0
author Wu-cheng Li <wuchengli@google.com> 1268002768 -0800
committer Wu-cheng Li <wuchengli@google.com> 1268161907 -0800

Unhide new preview callback methods.

bug:2358064
Change-Id: If9655ae8b7622ea6fc51e0054cfac7451962be66