Reland of [builtins] DeleteProperty: Handle last-added fast properties

src/ic/accessor-assembler.h

 // Copyright 2016 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.
 
 #ifndef V8_SRC_IC_ACCESSOR_ASSEMBLER_H_
 #define V8_SRC_IC_ACCESSOR_ASSEMBLER_H_
 
 #include "src/code-stub-assembler.h"
 
 namespace v8 {
@@ skipping 175 matching lines @@
                            const LoadICParameters* p, Label* slow,
                            UseStubCache use_stub_cache = kUseStubCache);
 
   // Low-level helpers.
 
   Node* PrepareValueForStore(Node* handler_word, Node* holder,
                              Representation representation, Node* transition,
                              Node* value, Label* bailout);
 
   // Extends properties backing store by JSObject::kFieldsAdded elements.
-  void ExtendPropertiesBackingStore(Node* object);
+  void ExtendPropertiesBackingStore(Node* object, Node* handler_word);
 
   void StoreNamedField(Node* handler_word, Node* object, bool is_inobject,
                        Representation representation, Node* value,
                        bool transition_to_field, Label* bailout);
 
   void EmitFastElementsBoundsCheck(Node* object, Node* elements,
                                    Node* intptr_index,
                                    Node* is_jsarray_condition, Label* miss);
   void EmitElementLoad(Node* object, Node* elements, Node* elements_kind,
                        Node* key, Node* is_jsarray_condition, Label* if_hole,
@@ skipping 83 matching lines @@
 
   CodeAssemblerLabel* const out_;
   CodeAssemblerVariable* const var_result_;
   CodeStubAssembler* const asm_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_SRC_IC_ACCESSOR_ASSEMBLER_H_