Make generators non-constructable.

test/mjsunit/es6/object-literals-method.js

Index: test/mjsunit/es6/object-literals-method.js
diff --git a/test/mjsunit/es6/object-literals-method.js b/test/mjsunit/es6/object-literals-method.js
index e4527cb776b569b33dcecbc9907bf23d1861ac90..90bc51ec03d55f352775a9a9728a7a48e31080ff 100644
--- a/test/mjsunit/es6/object-literals-method.js
+++ b/test/mjsunit/es6/object-literals-method.js
@@ -239,16 +239,14 @@ function assertIteratorResult(value, done, result) {
 })();
 
 
-(function TestGeneratorConstructable() {
+(function TestGeneratorNotConstructable() {
   var object = {
     *method() {
       yield 1;
     }
   };
 
-  var g = new object.method();
-  assertIteratorResult(1, false, g.next());
-  assertIteratorResult(undefined, true, g.next());
+  assertThrows(()=>new object.method());
 })();