Bug 957123 - Extend error reporting of AsyncShutdown. r=froydnj
Bug 957123 - Fix the use of File.prototype.close() by a few AddonManager tests. r=Unfocused
Bug 957123 - Complete port of test_TelemetrySendOldPings.js to OS.File. r=rvitillo
Bug 957123 - Better AsyncShutdown error reporting for OS.File. r=froydnj