[LookupIterator] Avoid additional descriptor lookup in TransitionToAccessorProperty

src/objects.h

 // Copyright 2015 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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/assert-scope.h"
@@ skipping 5970 matching lines @@
   // Maximal number of fast properties. Used to restrict the number of map
   // transitions to avoid an explosion in the number of maps for objects used as
   // dictionaries.
   inline bool TooManyFastProperties(StoreFromKeyed store_mode);
   static Handle<Map> TransitionToDataProperty(Handle<Map> map,
                                               Handle<Name> name,
                                               Handle<Object> value,
                                               PropertyAttributes attributes,
                                               StoreFromKeyed store_mode);
   static Handle<Map> TransitionToAccessorProperty(
-      Handle<Map> map, Handle<Name> name, AccessorComponent component,
-      Handle<Object> accessor, PropertyAttributes attributes);
+      Handle<Map> map, Handle<Name> name, int descriptor,
+      AccessorComponent component, Handle<Object> accessor,
+      PropertyAttributes attributes);
   static Handle<Map> ReconfigureExistingProperty(Handle<Map> map,
                                                  int descriptor,
                                                  PropertyKind kind,
                                                  PropertyAttributes attributes);
 
   inline void AppendDescriptor(Descriptor* desc);
 
   // Returns a copy of the map, prepared for inserting into the transition
   // tree (if the |map| owns descriptors then the new one will share
   // descriptors with |map|).
@@ skipping 4864 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_