Disinherit PropertyCell from Cell

src/objects.h

 // Copyright 2012 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/allocation.h"
@@ skipping 104 matching lines @@
 //           - SeqInternalizedString
 //             - SeqOneByteInternalizedString
 //             - SeqTwoByteInternalizedString
 //           - ConsInternalizedString
 //           - ExternalInternalizedString
 //             - ExternalOneByteInternalizedString
 //             - ExternalTwoByteInternalizedString
 //       - Symbol
 //     - HeapNumber
 //     - Cell
-//       - PropertyCell
+//     - PropertyCell
 //     - Code
 //     - Map
 //     - Oddball
 //     - Foreign
 //     - SharedFunctionInfo
 //     - Struct
 //       - Box
 //       - AccessorInfo
 //         - ExecutableAccessorInfo
 //       - AccessorPair
@@ skipping 9581 matching lines @@
 
   typedef FixedBodyDescriptor<kValueOffset,
                               kValueOffset + kPointerSize,
                               kSize> BodyDescriptor;
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(Cell);
 };
 
 
-class PropertyCell: public Cell {
+class PropertyCell : public HeapObject {
  public:
   // [value]: value of the global property.
   DECL_ACCESSORS(value, Object)
   // [dependent_code]: dependent code that depends on the type of the global
   // property.
   DECL_ACCESSORS(dependent_code, DependentCode)
 
   // Computes the new type of the cell's contents for the given value, but
   // without actually modifying the details.
   static PropertyCellType UpdatedType(Handle<PropertyCell> cell,
                                       Handle<Object> value,
                                       PropertyDetails details);
   static Handle<Object> UpdateCell(Handle<NameDictionary> dictionary, int entry,
                                    Handle<Object> value,
                                    PropertyDetails details);
 
   static Handle<PropertyCell> InvalidateEntry(Handle<NameDictionary> dictionary,
                                               int entry);
 
   static void AddDependentCompilationInfo(Handle<PropertyCell> cell,
                                           CompilationInfo* info);
 
   DECLARE_CAST(PropertyCell)
 
   // Dispatched behavior.
   DECLARE_PRINTER(PropertyCell)
   DECLARE_VERIFIER(PropertyCell)
 
   // Layout description.
+  static const int kValueOffset = HeapObject::kHeaderSize;
   static const int kDependentCodeOffset = kValueOffset + kPointerSize;
   static const int kSize = kDependentCodeOffset + kPointerSize;
 
   static const int kPointerFieldsBeginOffset = kValueOffset;
   static const int kPointerFieldsEndOffset = kSize;
 
   typedef FixedBodyDescriptor<kValueOffset,
                               kSize,
                               kSize> BodyDescriptor;
 
@@ skipping 1220 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_