Revert "[SAB] Move Atomics builtins to C++"

src/debug/mirrors.js

Index: src/debug/mirrors.js
diff --git a/src/debug/mirrors.js b/src/debug/mirrors.js
index 8096f2c54e00607c6dc7697bb6902e297ad86c7b..b534fecdc41bb4e741dd374802e61e58a931318a 100644
--- a/src/debug/mirrors.js
+++ b/src/debug/mirrors.js
@@ -11,10 +11,17 @@
 var GlobalArray = global.Array;
 var IsNaN = global.isNaN;
 var JSONStringify = global.JSON.stringify;
-var MapEntries = global.Map.prototype.entries;
-var MapIteratorNext = (new global.Map).entries().next;
-var SetIteratorNext = (new global.Set).values().next;
-var SetValues = global.Set.prototype.values;
+var MapEntries;
+var MapIteratorNext;
+var SetIteratorNext;
+var SetValues;
+
+utils.Import(function(from) {
+  MapEntries = from.MapEntries;
+  MapIteratorNext = from.MapIteratorNext;
+  SetIteratorNext = from.SetIteratorNext;
+  SetValues = from.SetValues;
+});
 
 // ----------------------------------------------------------------------------