Revert "Upgrade to 5.0.71.48"

This reverts commit 8389745919cae02139ddc085a63c00d024269cf2.

Change-Id: Ic5c75c8b3ddaf795972372fbc863a514862953c1
diff --git a/test/mjsunit/es6/generators-objects.js b/test/mjsunit/es6/generators-objects.js
index f304738..9390776 100644
--- a/test/mjsunit/es6/generators-objects.js
+++ b/test/mjsunit/es6/generators-objects.js
@@ -59,12 +59,18 @@
   assertEquals("[object Generator]", String(iter));
   assertEquals([], Object.getOwnPropertyNames(iter));
   assertTrue(iter !== g());
+
+  // g() is the same as new g().
+  iter = new g();
+  assertSame(g.prototype, Object.getPrototypeOf(iter));
+  assertTrue(iter instanceof g);
+  assertEquals("Generator", %_ClassOf(iter));
+  assertEquals("[object Generator]", String(iter));
   assertEquals("[object Generator]", Object.prototype.toString.call(iter));
   var gf = iter.__proto__.constructor;
   assertEquals("[object GeneratorFunction]", Object.prototype.toString.call(gf));
-
-  // generators are not constructable.
-  assertThrows(()=>new g());
+  assertEquals([], Object.getOwnPropertyNames(iter));
+  assertTrue(iter !== new g());
 }
 TestGeneratorObject();