Grow a class's field array into old space when bulk adding.

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 2789 matching lines @@
   new_arr.SetAt(arr.Length(), field);
   SetFields(new_arr);
 }
 
 
 void Class::AddFields(const GrowableObjectArray& new_fields) const {
   const intptr_t num_new_fields = new_fields.Length();
   if (num_new_fields == 0) return;
   const Array& arr = Array::Handle(fields());
   const intptr_t num_old_fields = arr.Length();
-  const Array& new_arr =
-      Array::Handle(Array::Grow(arr, num_old_fields + num_new_fields));
+  const Array& new_arr = Array::Handle(
+      Array::Grow(arr, num_old_fields + num_new_fields, Heap::kOld));
   Field& field = Field::Handle();
   for (intptr_t i = 0; i < num_new_fields; i++) {
     field ^= new_fields.At(i);
     new_arr.SetAt(i + num_old_fields, field);
   }
   SetFields(new_arr);
 }
 
 
 intptr_t Class::FindFieldIndex(const Field& needle) const {
@@ skipping 15991 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart