Code review comment for lp:~themue/juju-core/024-cleanup-watcher

Reviewers: mp+167748_code.launchpad.net,

Message:
Please take a look.

Description:
state: added CleanupWatcher

The CleanupWatcher signals the demand for the running of
state.Cleanup(). It is the first in a row of CLs to add
an according worker.

https://code.launchpad.net/~themue/juju-core/024-cleanup-watcher/+merge/167748

(do not edit description out of merge proposal)

Please review this at https://codereview.appspot.com/10078043/

Affected files:
   A [revision details]
   M state/state_test.go
   M state/watcher.go