[keyed-store-generic] Update protectors if needed

src/code-stub-assembler.cc

Index: src/code-stub-assembler.cc
diff --git a/src/code-stub-assembler.cc b/src/code-stub-assembler.cc
index c4b26ef697ae52d5fcfac2399b44edb7fc65e685..6e1bde011b7525f40e04694850e26cc0c9421a39 100644
--- a/src/code-stub-assembler.cc
+++ b/src/code-stub-assembler.cc
@@ -5796,6 +5796,21 @@ void CodeStubAssembler::UpdateFeedback(Node* feedback, Node* feedback_vector,
                          SKIP_WRITE_BARRIER);
 }
 
+void CodeStubAssembler::CheckForAssociatedProtector(Node* name,
+                                                    Label* if_protector) {
+  // This list must be kept in sync with LookupIterator::UpdateProtector!
+  // TODO(jkummerow): Would it be faster to have a bit in Symbol::flags()?
+  GotoIf(WordEqual(name, LoadRoot(Heap::kconstructor_stringRootIndex)),
+         if_protector);
+  GotoIf(WordEqual(name, LoadRoot(Heap::kiterator_symbolRootIndex)),
+         if_protector);
+  GotoIf(WordEqual(name, LoadRoot(Heap::kspecies_symbolRootIndex)),
+         if_protector);
+  GotoIf(WordEqual(name, LoadRoot(Heap::kis_concat_spreadable_symbolRootIndex)),
+         if_protector);
+  // Fall through if no case matched.
+}
+
 Node* CodeStubAssembler::LoadReceiverMap(Node* receiver) {
   return Select(TaggedIsSmi(receiver),
                 [=] { return LoadRoot(Heap::kHeapNumberMapRootIndex); },