Serializer: serialize internal references via object visitor.

src/ia32/assembler-ia32.h

Index: src/ia32/assembler-ia32.h
diff --git a/src/ia32/assembler-ia32.h b/src/ia32/assembler-ia32.h
index 7edcf527f2ee03aeb2d70be2ccbb31752f7f7fcb..656333ed4e7289210465d9e9268f3fbf7a1ac422 100644
--- a/src/ia32/assembler-ia32.h
+++ b/src/ia32/assembler-ia32.h
@@ -547,6 +547,10 @@ class Assembler : public AssemblerBase {
     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 pc, Address target);
+
   static const int kSpecialTargetSize = kPointerSize;
 
   // Distance between the address of the code target in the call instruction