[runtime] Add MapUpdater class that manages all kinds of map updates.

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 3007 matching lines @@
     result = GetHeap()->empty_sloppy_arguments_elements();
   } else if (has_fixed_typed_array_elements()) {
     result = GetHeap()->EmptyFixedTypedArrayForMap(this);
   } else {
     UNREACHABLE();
   }
   DCHECK(!GetHeap()->InNewSpace(result));
   return result;
 }
 
-// static
-Handle<Map> Map::ReconfigureProperty(Handle<Map> map, int modify_index,
-                                     PropertyKind new_kind,
-                                     PropertyAttributes new_attributes,
-                                     Representation new_representation,
-                                     Handle<FieldType> new_field_type,
-                                     StoreMode store_mode) {
-  return Reconfigure(map, map->elements_kind(), modify_index, new_kind,
-                     new_attributes, new_representation, new_field_type,
-                     store_mode);
-}
-
-// static
-Handle<Map> Map::ReconfigureElementsKind(Handle<Map> map,
-                                         ElementsKind new_elements_kind) {
-  return Reconfigure(map, new_elements_kind, -1, kData, NONE,
-                     Representation::None(), FieldType::None(map->GetIsolate()),
-                     ALLOW_IN_DESCRIPTOR);
-}
-
 Object** DescriptorArray::GetKeySlot(int descriptor_number) {
   DCHECK(descriptor_number < number_of_descriptors());
   return RawFieldOfElementAt(ToKeyIndex(descriptor_number));
 }
 
 
 Object** DescriptorArray::GetDescriptorStartSlot(int descriptor_number) {
   return GetKeySlot(descriptor_number);
 }
 
@@ skipping 5393 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_