[builtins] implement Array.prototype[@@iterator] in TFJ builtins

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index cbde8ac562bd515f706e639f4f2710a068f94463..0e7950b98cfec9a26fdb56f7884f228cc8afeff6 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -1098,7 +1098,7 @@ Object* Isolate::Throw(Object* exception, MessageLocation* location) {
       location = &computed_location;
     }
 
-    if (bootstrapper()->IsActive()) {
+    if (false && bootstrapper()->IsActive()) {
       // It's not safe to try to make message objects or collect stack traces
       // while the bootstrapper is active since the infrastructure may not have
       // been properly initialized.
@@ -2924,6 +2924,14 @@ void Isolate::InvalidateStringLengthOverflowProtector() {
   DCHECK(!IsStringLengthOverflowIntact());
 }
 
+void Isolate::InvalidateArrayIteratorProtector() {
+  DCHECK(Smi::cast(heap()->array_iterator_protector()->value())->value() ==
+         kArrayProtectorValid);
+  PropertyCell::SetValueWithInvalidation(
+      factory()->array_iterator_protector(),
+      handle(Smi::FromInt(kArrayProtectorInvalid), this));
+}
+
 bool Isolate::IsAnyInitialArrayPrototype(Handle<JSArray> array) {
   DisallowHeapAllocation no_gc;
   return IsInAnyContext(*array, Context::INITIAL_ARRAY_PROTOTYPE_INDEX);