401         it = devices.erase(it);  in HandleAutonomusVolumeChange()
482     op->devices_.erase(it);  in OnVolumeControlStateReadOrNotified()
499     ongoing_operations_.erase(op);  in OnVolumeControlStateReadOrNotified()
703       op.devices_.erase(it);  in RemoveDeviceFromOperationList()
707     ongoing_operations_.erase(  in RemoveDeviceFromOperationList()
726       op->devices_.erase(it);  in RemoveDeviceFromOperationList()
728         ongoing_operations_.erase(op);  in RemoveDeviceFromOperationList()
751         op = ongoing_operations_.erase(op);  in RemovePendingVolumeControlOperations()
758           op->devices_.erase(it);  in RemovePendingVolumeControlOperations()
762         op = ongoing_operations_.erase(op);  in RemovePendingVolumeControlOperations()
864                        devices.erase(  in PrepareVolumeControlOperation()
918           it = devices.erase(it);  in MuteUnmute()
923           it = devices.erase(it);  in MuteUnmute()
997           it = devices.erase(it);  in SetVolume()
1002           it = devices.erase(it);  in SetVolume()