Bug 945948 - Part 1: Use a Map to associate cursors with message managers. r=reuben, a=koi+
Bug 945948 - Part 2: Test contacts shutdown of cursors. r=reuben, a=koi+
Bug 927560 - Shutdown osfile_async_worker.js when it's not needed. r=froydnj, a=koi+
Bug 927560 - Shutdown osfile_async_worker.js, companion tests. r=froydnj, a=koi+
Bug 944859 - osfile_async_worker.js worker is never shut down in the parent process. r=yoric, a=koi+