Call RecordWriteIntoCode in RelocInfo::set_target_cell.

src/heap/incremental-marking.cc

Index: src/heap/incremental-marking.cc
diff --git a/src/heap/incremental-marking.cc b/src/heap/incremental-marking.cc
index 52d0ca4e51b6e297c04c94bfb686116722d32bba..5a1109b1a7268d8e3a9b6e3126641420a95a75eb 100644
--- a/src/heap/incremental-marking.cc
+++ b/src/heap/incremental-marking.cc
@@ -128,8 +128,7 @@ void IncrementalMarking::RecordWriteIntoCodeSlow(HeapObject* obj,
                                                  Object* value) {
   if (BaseRecordWrite(obj, value)) {
       // Object is not going to be rescanned.  We need to record the slot.
-      heap_->mark_compact_collector()->RecordRelocSlot(rinfo,
-                                                       Code::cast(value));
+      heap_->mark_compact_collector()->RecordRelocSlot(rinfo, value);
   }
 }