Removed transitions from the accessor pair descriptors.

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2530 matching lines @@
   inline void Get(int descriptor_number, Descriptor* desc);
   inline void Set(int descriptor_number,
                   Descriptor* desc,
                   const WhitenessWitness&);
   // Append automatically sets the enumeration index. This should only be used
   // to add descriptors in bulk at the end, followed by sorting the descriptor
   // array.
   inline void Append(Descriptor* desc,
                      const WhitenessWitness&);
 
-  // Transfer a complete descriptor from the src descriptor array to the dst
-  // one, dropping map transitions in CALLBACKS.
-  static void CopyFrom(Handle<DescriptorArray> dst,
-                       int dst_index,
-                       Handle<DescriptorArray> src,
-                       int src_index,
-                       const WhitenessWitness& witness);
-
   // Transfer a complete descriptor from the src descriptor array to this
-  // descriptor array, dropping map transitions in CALLBACKS.
-  MUST_USE_RESULT MaybeObject* CopyFrom(int dst_index,
-                                        DescriptorArray* src,
-                                        int src_index,
-                                        const WhitenessWitness&);
+  // descriptor array.
+  void CopyFrom(int dst_index,
+                DescriptorArray* src,
+                int src_index,
+                const WhitenessWitness&);
 
   // Copy the descriptor array, insert a new descriptor and optionally
   // remove map transitions.  If the descriptor is already present, it is
   // replaced.  If a replaced descriptor is a real property (not a transition
   // or null), its enumeration index is kept as is.
   // If adding a real property, map transitions must be removed.  If adding
   // a transition, they must not be removed.  All null descriptors are removed.
   MUST_USE_RESULT MaybeObject* CopyInsert(Descriptor* descriptor);
   MUST_USE_RESULT MaybeObject* CopyAdd(Descriptor* descriptor);
   MUST_USE_RESULT MaybeObject* CopyReplace(Descriptor* descriptor,
@@ skipping 2233 matching lines @@
 
   static bool IsValidElementsTransition(ElementsKind from_kind,
                                         ElementsKind to_kind);
 
   inline bool HasTransitionArray();
   inline bool HasElementsTransition();
   inline Map* elements_transition_map();
   MUST_USE_RESULT inline MaybeObject* set_elements_transition_map(
       Map* transitioned_map);
   inline TransitionArray* transitions();
-  inline void SetTransition(int index, Object* value);
-  MUST_USE_RESULT inline MaybeObject* AddTransition(String* key, Object* value);
+  inline void SetTransition(int index, Map* target);
+  MUST_USE_RESULT inline MaybeObject* AddTransition(String* key, Map* target);
   MUST_USE_RESULT inline MaybeObject* set_transitions(
       TransitionArray* transitions);
   inline void ClearTransitions(Heap* heap,
                                WriteBarrierMode mode = UPDATE_WRITE_BARRIER);
 
   // Tells whether the map is attached to SharedFunctionInfo
   // (for inobject slack tracking).
   inline void set_attached_to_shared_function_info(bool value);
 
   inline bool attached_to_shared_function_info();
@@ skipping 3510 matching lines @@
 //   * undefined: considered an accessor by the spec, too, strangely enough
 //   * the hole: an accessor which has not been set
 //   * a pointer to a map: a transition used to ensure map sharing
 class AccessorPair: public Struct {
  public:
   DECL_ACCESSORS(getter, Object)
   DECL_ACCESSORS(setter, Object)
 
   static inline AccessorPair* cast(Object* obj);
 
-  MUST_USE_RESULT MaybeObject* CopyWithoutTransitions();
+  MUST_USE_RESULT MaybeObject* Copy();
 
   Object* get(AccessorComponent component) {
     return component == ACCESSOR_GETTER ? getter() : setter();
   }
 
   void set(AccessorComponent component, Object* value) {
     if (component == ACCESSOR_GETTER) {
       set_getter(value);
     } else {
       set_setter(value);
@@ skipping 528 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_