Revert 20313 - "Ship promises and weak collections"

test/mjsunit/es6/weak_collections.js

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-// Flags: --expose-gc --allow-natives-syntax
+// Flags: --harmony-weak-collections --expose-gc --allow-natives-syntax
 
 
 // Note: this test is superseded by harmony/collections.js.
 // IF YOU CHANGE THIS FILE, apply the same changes to harmony/collections.js!
 // TODO(rossberg): Remove once non-weak collections have caught up.
 
 // Test valid getter and setter calls on WeakSets.
 function TestValidSetCalls(m) {
   assertDoesNotThrow(function () { m.add(new Object) });
   assertDoesNotThrow(function () { m.has(new Object) });
@@ skipping 179 matching lines @@
 // Test name of constructor.
 assertEquals("WeakMap", WeakMap.name);
 assertEquals("WeakSet", WeakSet.name);
 
 
 // Test prototype property of WeakMap and WeakSet.
 function TestPrototype(C) {
   assertTrue(C.prototype instanceof Object);
   assertEquals({
     value: {},
-    writable: false,
+    writable: true,  // TODO(2793): This should be non-writable.
     enumerable: false,
     configurable: false
   }, Object.getOwnPropertyDescriptor(C, "prototype"));
 }
 TestPrototype(WeakMap);
 TestPrototype(WeakSet);
 
 
 // Test constructor property of the WeakMap and WeakSet prototype.
 function TestConstructor(C) {
@@ skipping 85 matching lines @@
 
 // Test WeakSet clear
 (function() {
   var k = new Object();
   var w = new WeakSet();
   w.add(k);
   assertTrue(w.has(k));
   w.clear();
   assertFalse(w.has(k));
 })();