Bug 791910 - Deal with dead managers in our list. r=cjones

--HG--
extra : rebase_source : 3a3bda33a7cecd7336b84ad4939aa55de2e5d0dd

dom/wifi/WifiWorker.js

@@ -1948,8 +1948,15 @@ WifiWorker.prototype = {
 
   _domManagers: [],
   _fireEvent: function(message, data) {
-    this._domManagers.forEach(function(obj) {
-      obj.manager.sendAsyncMessage("WifiManager:" + message, data);
+    // TODO (bug 791911): Managers don't correctly tell us when they're getting
+    // destroyed, so prune dead managers here.
+    this._domManagers = this._domManagers.filter(function(obj) {
+      try {
+        obj.manager.sendAsyncMessage("WifiManager:" + message, data);
+        return true;
+      } catch(e) {
+        return false;
+      }
     });
   },