[heap] Replace RELOCATED_CODE_OBJECT with proper recording

src/heap/slot-set.h

 // Copyright 2016 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_SLOT_SET_H
 #define V8_SLOT_SET_H
 
 #include "src/allocation.h"
 #include "src/base/bits.h"
 #include "src/utils.h"
@@ skipping 199 matching lines @@
     *bit_index = slot & (kBitsPerCell - 1);
   }
 
   uint32_t* bucket[kBuckets];
   Address page_start_;
 };
 
 enum SlotType {
   EMBEDDED_OBJECT_SLOT,
   OBJECT_SLOT,
-  RELOCATED_CODE_OBJECT,
   CELL_TARGET_SLOT,
   CODE_TARGET_SLOT,
   CODE_ENTRY_SLOT,
   DEBUG_TARGET_SLOT,
   NUMBER_OF_SLOT_TYPES
 };
 
 // Data structure for maintaining a multiset of typed slots in a page.
 // Typed slots can only appear in Code and JSFunction objects, so
 // the maximum possible offset is limited by the LargePage::kMaxCodePageSize.
@@ skipping 98 matching lines @@
   };
 
   Address page_start_;
   Chunk* chunk_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_SLOT_SET_H