Mark internal AccessorInfo properties as "special data properties"

src/objects-inl.h

 // 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 7018 matching lines @@
 bool AccessorInfo::all_can_write() {
   return BooleanBit::get(flag(), kAllCanWriteBit);
 }
 
 
 void AccessorInfo::set_all_can_write(bool value) {
   set_flag(BooleanBit::set(flag(), kAllCanWriteBit, value));
 }
 
 
+bool AccessorInfo::is_special_data_property() {
+  return BooleanBit::get(flag(), kSpecialDataProperty);
+}
+
+
+void AccessorInfo::set_is_special_data_property(bool value) {
+  set_flag(BooleanBit::set(flag(), kSpecialDataProperty, value));
+}
+
+
 PropertyAttributes AccessorInfo::property_attributes() {
   return AttributesField::decode(static_cast<uint32_t>(flag()->value()));
 }
 
 
 void AccessorInfo::set_property_attributes(PropertyAttributes attributes) {
   set_flag(Smi::FromInt(AttributesField::update(flag()->value(), attributes)));
 }
 
 
@@ skipping 549 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_