Fix and cleanup Map::GeneralizeRepresentation().

src/property.h

 // Copyright 2014 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_PROPERTY_H_
 #define V8_PROPERTY_H_
 
 #include "isolate.h"
 #include "factory.h"
 #include "types.h"
@@ skipping 48 matching lines @@
              Handle<Object> value,
              PropertyAttributes attributes,
              PropertyType type,
              Representation representation,
              int field_index = 0)
       : key_(key),
         value_(value),
         details_(attributes, type, representation, field_index) { }
 
   friend class DescriptorArray;
+  friend class Map;
 };
 
 
 class FieldDescriptor V8_FINAL : public Descriptor {
  public:
   FieldDescriptor(Handle<Name> key,
                   int field_index,
                   PropertyAttributes attributes,
                   Representation representation)
       : Descriptor(key, HeapType::Any(key->GetIsolate()), attributes,
@@ skipping 450 matching lines @@
   JSReceiver* holder_;
   Map* transition_;
   int number_;
   bool cacheable_;
   PropertyDetails details_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROPERTY_H_