Disinherit PropertyCell from Cell

src/hydrogen-instructions.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_HYDROGEN_INSTRUCTIONS_H_
 #define V8_HYDROGEN_INSTRUCTIONS_H_
 
 #include <cstring>
 #include <iosfwd>
 
@@ skipping 6120 matching lines @@
 
   // Create an access to the backing store of an object.
   static HObjectAccess ForBackingStoreOffset(int offset,
       Representation representation = Representation::Tagged());
 
   // Create an access to a resolved field (in-object or backing store).
   static HObjectAccess ForField(Handle<Map> map, int index,
                                 Representation representation,
                                 Handle<String> name);
 
-  // Create an access for the payload of a Cell or JSGlobalPropertyCell.
-  static HObjectAccess ForCellPayload(Isolate* isolate);
-
   static HObjectAccess ForJSTypedArrayLength() {
     return HObjectAccess::ForObservableJSObjectOffset(
         JSTypedArray::kLengthOffset);
   }
 
   static HObjectAccess ForJSArrayBufferBackingStore() {
     return HObjectAccess::ForObservableJSObjectOffset(
         JSArrayBuffer::kBackingStoreOffset, Representation::External());
   }
 
@@ skipping 1725 matching lines @@
 };
 
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_