[heap] Record references in the new code objects in heap::CopyCode.

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index d17e07d5959a3bf1318bf22f64b65eeeafd254ac..7493c808b8e1f7da28fb76387ba31d7e1fe5a7da 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -1129,6 +1129,7 @@ class Heap {
   inline void RecordWrite(Object* object, int offset, Object* o);
   inline void RecordWriteIntoCode(Code* host, RelocInfo* rinfo, Object* target);
   void RecordWriteIntoCodeSlow(Code* host, RelocInfo* rinfo, Object* target);
+  void RecordWritesIntoCode(Code* code);
   inline void RecordFixedArrayElements(FixedArray* array, int offset,
                                        int length);