Call RecordWriteIntoCode in RelocInfo::set_target_cell.

src/x87/assembler-x87-inl.h

Index: src/x87/assembler-x87-inl.h
diff --git a/src/x87/assembler-x87-inl.h b/src/x87/assembler-x87-inl.h
index 0e529c7ab624175325fd3b73862bdf328216f981..30c05c5f3e5416754ac4192e6ea95fdf6473281c 100644
--- a/src/x87/assembler-x87-inl.h
+++ b/src/x87/assembler-x87-inl.h
@@ -204,10 +204,8 @@ void RelocInfo::set_target_cell(Cell* cell,
     Assembler::FlushICache(isolate_, pc_, sizeof(Address));
   }
   if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL) {
-    // TODO(1550) We are passing NULL as a slot because cell can never be on
-    // evacuation candidate.
-    host()->GetHeap()->incremental_marking()->RecordWrite(
-        host(), NULL, cell);
+    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this,
+                                                                  cell);
   }
 }