PPC: Serializer: serialize internal references via object visitor.

src/ppc/assembler-ppc.h

Index: src/ppc/assembler-ppc.h
diff --git a/src/ppc/assembler-ppc.h b/src/ppc/assembler-ppc.h
index 9676cbb59f17d4bbd7f9c1507dc5bd7f2d60e259..72349976b6bb7b2912c58d7166e42cb701c17330 100644
--- a/src/ppc/assembler-ppc.h
+++ b/src/ppc/assembler-ppc.h
@@ -629,6 +629,10 @@ class Assembler : public AssemblerBase {
   inline static void deserialization_set_special_target_at(
       Address instruction_payload, Code* code, Address target);
 
+  // This sets the internal reference at the pc.
+  inline static void deserialization_set_target_internal_reference_at(
+      Address pc, Address target);
+
   // Size of an instruction.
   static const int kInstrSize = sizeof(Instr);