Added LookupResult::GetValueFromMap.

src/property.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 319 matching lines @@
     return Map::cast(map->transitions()->GetValue(number_));
   }
 
   int GetFieldIndex() {
     ASSERT(lookup_type_ == DESCRIPTOR_TYPE);
     ASSERT(IsField());
     return Descriptor::IndexFromValue(GetValue());
   }
 
   int GetLocalFieldIndexFromMap(Map* map) {
-    ASSERT(lookup_type_ == DESCRIPTOR_TYPE);
     ASSERT(IsField());
-    return Descriptor::IndexFromValue(
-        map->instance_descriptors()->GetValue(number_)) -
+    return Descriptor::IndexFromValue(GetValueFromMap(map)) -
         map->inobject_properties();
   }
 
   int GetDictionaryEntry() {
     ASSERT(lookup_type_ == DICTIONARY_TYPE);
     return number_;
   }
 
   JSFunction* GetConstantFunction() {
     ASSERT(type() == CONSTANT_FUNCTION);
     return JSFunction::cast(GetValue());
   }
 
   JSFunction* GetConstantFunctionFromMap(Map* map) {
-    ASSERT(lookup_type_ == DESCRIPTOR_TYPE);
     ASSERT(type() == CONSTANT_FUNCTION);
-    return JSFunction::cast(map->instance_descriptors()->GetValue(number_));
+    return JSFunction::cast(GetValueFromMap(map));
   }
 
   Object* GetCallbackObject() {
     switch (lookup_type_) {
       case CONSTANT_TYPE:
         return HEAP->prototype_accessors();
       case TRANSITION_TYPE:
         return GetTransitionValue();
       default:
         return GetValue();
     }
   }
 
 #ifdef OBJECT_PRINT
   void Print(FILE* out);
 #endif
 
   Object* GetValue() {
     if (lookup_type_ == DESCRIPTOR_TYPE) {
-      DescriptorArray* descriptors = holder()->map()->instance_descriptors();
-      return descriptors->GetValue(number_);
+      return GetValueFromMap(holder()->map());
     }
     // In the dictionary case, the data is held in the value field.
     ASSERT(lookup_type_ == DICTIONARY_TYPE);
     return holder()->GetNormalizedProperty(this);
   }
 
+  Object* GetValueFromMap(Map* map) const {
+    ASSERT(lookup_type_ == DESCRIPTOR_TYPE);
+    return map->instance_descriptors()->GetValue(number_);
+  }
+
   void Iterate(ObjectVisitor* visitor);
 
  private:
   Isolate* isolate_;
   LookupResult* next_;
 
   // Where did we find the result;
   enum {
     NOT_FOUND,
     DESCRIPTOR_TYPE,
     TRANSITION_TYPE,
     DICTIONARY_TYPE,
     HANDLER_TYPE,
     INTERCEPTOR_TYPE,
     CONSTANT_TYPE
   } lookup_type_;
 
   JSReceiver* holder_;
   int number_;
   bool cacheable_;
   PropertyDetails details_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROPERTY_H_