timers: use HandleWrap::Unrefed

lib/timers.js

@@ -133,8 +133,6 @@ function insert(item, unrefed) {
     list = new TimersList(msecs, unrefed);
     L.init(list);
     list._timer._list = list;
-
-    if (unrefed === true) list._timer.unref();
     list._timer.start(msecs, 0);
 
     lists[msecs] = list;
@@ -149,7 +147,7 @@ function TimersList(msecs, unrefed) {
   this._idleNext = null; // Create the list with the linkedlist properties to
   this._idlePrev = null; // prevent any unnecessary hidden class changes.
   this._timer = new TimerWrap();
-  this._unrefed = unrefed;
+  if (unrefed === true) this._timer.unref();
   this.msecs = msecs;
 }
 
@@ -206,12 +204,12 @@ function listOnTimeout() {
   // As such, we can remove the list and clean up the TimerWrap C++ handle.
   debug('%d list empty', msecs);
   assert(L.isEmpty(list));
-  this.close();
-  if (list._unrefed === true) {
-    delete unrefedLists[msecs];
-  } else {
+  if (list._timer.isRefed() === true) {
     delete refedLists[msecs];
+  } else {
+    delete unrefedLists[msecs];
   }
+  this.close();
 }