Fix two bugs in the code compaction:

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 7503c0ad7369797c8eb46ca10789b693ac758a0c..2924a08190e0d9beca87dc0d14f5594a0d1a0e62 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -4739,8 +4739,7 @@ void Heap::IterateStrongRoots(ObjectVisitor* v, VisitMode mode) {
   // Iterate over the builtin code objects and code stubs in the
   // heap. Note that it is not necessary to iterate over code objects
   // on scavenge collections.
-  if (mode != VISIT_ALL_IN_SCAVENGE &&
-      mode != VISIT_ALL_IN_SWEEP_NEWSPACE) {
+  if (mode != VISIT_ALL_IN_SCAVENGE) {
     isolate_->builtins()->IterateBuiltins(v);
   }
   v->Synchronize("builtins");