Merge "Add a callback for when a gl functor is released" into nyc-dev am: 85cfc8c
am: 9e06acf

* commit '9e06acf392e82cb539b9e40ec9909a9c8dbc221b':
  Add a callback for when a gl functor is released

Change-Id: I4f3d272a598f45a6124a6fc64f9178f1c4d659a0