Serializer: serialize internal references via object visitor.

src/x64/assembler-x64.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 552 matching lines @@
   // Return the code target address of the patch debug break slot
   inline static Address break_address_from_return_address(Address pc);
 
   // This sets the branch destination (which is in the instruction on x64).
   // This is for calls and branches within generated code.
   inline static void deserialization_set_special_target_at(
       Address instruction_payload, Code* code, Address target) {
     set_target_address_at(instruction_payload, code, target);
   }
 
+  // This sets the internal reference at the pc.
+  inline static void deserialization_set_target_internal_reference_at(
+      Address instruction, Address target);
+
   static inline RelocInfo::Mode RelocInfoNone() {
     if (kPointerSize == kInt64Size) {
       return RelocInfo::NONE64;
     } else {
       DCHECK(kPointerSize == kInt32Size);
       return RelocInfo::NONE32;
     }
   }
 
   inline Handle<Object> code_target_object_handle_at(Address pc);
@@ skipping 1298 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_ASSEMBLER_X64_H_