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

src/heap/heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/ast/context-slot-cache.h"
 #include "src/base/bits.h"
@@ skipping 2844 matching lines @@
   // Allocate the empty script.
   Handle<Script> script = factory->NewScript(factory->empty_string());
   script->set_type(Script::TYPE_NATIVE);
   set_empty_script(*script);
 
   Handle<PropertyCell> cell = factory->NewPropertyCell();
   cell->set_value(Smi::FromInt(Isolate::kArrayProtectorValid));
   set_array_protector(*cell);
 
   cell = factory->NewPropertyCell();
+  cell->set_value(Smi::FromInt(Isolate::kArrayProtectorValid));
+  set_array_iterator_protector(*cell);
+
+  cell = factory->NewPropertyCell();
   cell->set_value(the_hole_value());
   set_empty_property_cell(*cell);
 
   cell = factory->NewPropertyCell();
   cell->set_value(Smi::FromInt(Isolate::kArrayProtectorValid));
   set_has_instance_protector(*cell);
 
   Handle<Cell> is_concat_spreadable_cell = factory->NewCell(
       handle(Smi::FromInt(Isolate::kArrayProtectorValid), isolate()));
   set_is_concat_spreadable_protector(*is_concat_spreadable_cell);
@@ skipping 3628 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8